diff --git a/esphome/components/aht10/aht10.h b/esphome/components/aht10/aht10.h
index bfb6b07a7a..4d0eaa5919 100644
--- a/esphome/components/aht10/aht10.h
+++ b/esphome/components/aht10/aht10.h
@@ -18,8 +18,8 @@ class AHT10Component : public PollingComponent, public i2c::I2CDevice {
   void set_humidity_sensor(sensor::Sensor *humidity_sensor) { humidity_sensor_ = humidity_sensor; }
 
  protected:
-  sensor::Sensor *temperature_sensor_;
-  sensor::Sensor *humidity_sensor_;
+  sensor::Sensor *temperature_sensor_{nullptr};
+  sensor::Sensor *humidity_sensor_{nullptr};
 };
 
 }  // namespace aht10
diff --git a/esphome/components/am2320/am2320.h b/esphome/components/am2320/am2320.h
index 33e1d30aa0..da1e87cf65 100644
--- a/esphome/components/am2320/am2320.h
+++ b/esphome/components/am2320/am2320.h
@@ -21,8 +21,8 @@ class AM2320Component : public PollingComponent, public i2c::I2CDevice {
   bool read_data_(uint8_t *data);
   bool read_bytes_(uint8_t a_register, uint8_t *data, uint8_t len, uint32_t conversion = 0);
 
-  sensor::Sensor *temperature_sensor_;
-  sensor::Sensor *humidity_sensor_;
+  sensor::Sensor *temperature_sensor_{nullptr};
+  sensor::Sensor *humidity_sensor_{nullptr};
 };
 
 }  // namespace am2320
diff --git a/esphome/components/as3935/as3935.h b/esphome/components/as3935/as3935.h
index 2e65aab4d1..2cba9b11a0 100644
--- a/esphome/components/as3935/as3935.h
+++ b/esphome/components/as3935/as3935.h
@@ -92,9 +92,9 @@ class AS3935Component : public Component {
 
   virtual void write_register(uint8_t reg, uint8_t mask, uint8_t bits, uint8_t start_position) = 0;
 
-  sensor::Sensor *distance_sensor_;
-  sensor::Sensor *energy_sensor_;
-  binary_sensor::BinarySensor *thunder_alert_binary_sensor_;
+  sensor::Sensor *distance_sensor_{nullptr};
+  sensor::Sensor *energy_sensor_{nullptr};
+  binary_sensor::BinarySensor *thunder_alert_binary_sensor_{nullptr};
   GPIOPin *irq_pin_;
 
   bool indoor_;
diff --git a/esphome/components/bl0939/bl0939.h b/esphome/components/bl0939/bl0939.h
index d3dab67cc1..673d4ff351 100644
--- a/esphome/components/bl0939/bl0939.h
+++ b/esphome/components/bl0939/bl0939.h
@@ -75,16 +75,16 @@ class BL0939 : public PollingComponent, public uart::UARTDevice {
   void dump_config() override;
 
  protected:
-  sensor::Sensor *voltage_sensor_;
-  sensor::Sensor *current_sensor_1_;
-  sensor::Sensor *current_sensor_2_;
+  sensor::Sensor *voltage_sensor_{nullptr};
+  sensor::Sensor *current_sensor_1_{nullptr};
+  sensor::Sensor *current_sensor_2_{nullptr};
   // NB This may be negative as the circuits is seemingly able to measure
   // power in both directions
-  sensor::Sensor *power_sensor_1_;
-  sensor::Sensor *power_sensor_2_;
-  sensor::Sensor *energy_sensor_1_;
-  sensor::Sensor *energy_sensor_2_;
-  sensor::Sensor *energy_sensor_sum_;
+  sensor::Sensor *power_sensor_1_{nullptr};
+  sensor::Sensor *power_sensor_2_{nullptr};
+  sensor::Sensor *energy_sensor_1_{nullptr};
+  sensor::Sensor *energy_sensor_2_{nullptr};
+  sensor::Sensor *energy_sensor_sum_{nullptr};
 
   // Divide by this to turn into Watt
   float power_reference_ = BL0939_PREF;
diff --git a/esphome/components/bl0940/bl0940.h b/esphome/components/bl0940/bl0940.h
index 49c8e50595..2d4e7ccaac 100644
--- a/esphome/components/bl0940/bl0940.h
+++ b/esphome/components/bl0940/bl0940.h
@@ -75,14 +75,14 @@ class BL0940 : public PollingComponent, public uart::UARTDevice {
   void dump_config() override;
 
  protected:
-  sensor::Sensor *voltage_sensor_;
-  sensor::Sensor *current_sensor_;
+  sensor::Sensor *voltage_sensor_{nullptr};
+  sensor::Sensor *current_sensor_{nullptr};
   // NB This may be negative as the circuits is seemingly able to measure
   // power in both directions
-  sensor::Sensor *power_sensor_;
-  sensor::Sensor *energy_sensor_;
-  sensor::Sensor *internal_temperature_sensor_;
-  sensor::Sensor *external_temperature_sensor_;
+  sensor::Sensor *power_sensor_{nullptr};
+  sensor::Sensor *energy_sensor_{nullptr};
+  sensor::Sensor *internal_temperature_sensor_{nullptr};
+  sensor::Sensor *external_temperature_sensor_{nullptr};
 
   // Max difference between two measurements of the temperature. Used to avoid noise.
   float max_temperature_diff_{0};
diff --git a/esphome/components/bl0942/bl0942.h b/esphome/components/bl0942/bl0942.h
index 8149b7493b..12489915e1 100644
--- a/esphome/components/bl0942/bl0942.h
+++ b/esphome/components/bl0942/bl0942.h
@@ -43,13 +43,13 @@ class BL0942 : public PollingComponent, public uart::UARTDevice {
   void dump_config() override;
 
  protected:
-  sensor::Sensor *voltage_sensor_;
-  sensor::Sensor *current_sensor_;
+  sensor::Sensor *voltage_sensor_{nullptr};
+  sensor::Sensor *current_sensor_{nullptr};
   // NB This may be negative as the circuits is seemingly able to measure
   // power in both directions
-  sensor::Sensor *power_sensor_;
-  sensor::Sensor *energy_sensor_;
-  sensor::Sensor *frequency_sensor_;
+  sensor::Sensor *power_sensor_{nullptr};
+  sensor::Sensor *energy_sensor_{nullptr};
+  sensor::Sensor *frequency_sensor_{nullptr};
 
   // Divide by this to turn into Watt
   float power_reference_ = BL0942_PREF;
diff --git a/esphome/components/bme280/bme280.h b/esphome/components/bme280/bme280.h
index 8511f73382..50d398c40f 100644
--- a/esphome/components/bme280/bme280.h
+++ b/esphome/components/bme280/bme280.h
@@ -96,9 +96,9 @@ class BME280Component : public PollingComponent, public i2c::I2CDevice {
   BME280Oversampling pressure_oversampling_{BME280_OVERSAMPLING_16X};
   BME280Oversampling humidity_oversampling_{BME280_OVERSAMPLING_16X};
   BME280IIRFilter iir_filter_{BME280_IIR_FILTER_OFF};
-  sensor::Sensor *temperature_sensor_;
-  sensor::Sensor *pressure_sensor_;
-  sensor::Sensor *humidity_sensor_;
+  sensor::Sensor *temperature_sensor_{nullptr};
+  sensor::Sensor *pressure_sensor_{nullptr};
+  sensor::Sensor *humidity_sensor_{nullptr};
   enum ErrorCode {
     NONE = 0,
     COMMUNICATION_FAILED,
diff --git a/esphome/components/bme680/bme680.h b/esphome/components/bme680/bme680.h
index 0671cd990e..6446449742 100644
--- a/esphome/components/bme680/bme680.h
+++ b/esphome/components/bme680/bme680.h
@@ -129,10 +129,10 @@ class BME680Component : public PollingComponent, public i2c::I2CDevice {
   uint16_t heater_temperature_{320};
   uint16_t heater_duration_{150};
 
-  sensor::Sensor *temperature_sensor_;
-  sensor::Sensor *pressure_sensor_;
-  sensor::Sensor *humidity_sensor_;
-  sensor::Sensor *gas_resistance_sensor_;
+  sensor::Sensor *temperature_sensor_{nullptr};
+  sensor::Sensor *pressure_sensor_{nullptr};
+  sensor::Sensor *humidity_sensor_{nullptr};
+  sensor::Sensor *gas_resistance_sensor_{nullptr};
 };
 
 }  // namespace bme680
diff --git a/esphome/components/bme680_bsec/bme680_bsec.h b/esphome/components/bme680_bsec/bme680_bsec.h
index 650b4d2413..6fe8f8fef7 100644
--- a/esphome/components/bme680_bsec/bme680_bsec.h
+++ b/esphome/components/bme680_bsec/bme680_bsec.h
@@ -100,15 +100,15 @@ class BME680BSECComponent : public Component, public i2c::I2CDevice {
   SampleRate pressure_sample_rate_{SAMPLE_RATE_DEFAULT};
   SampleRate humidity_sample_rate_{SAMPLE_RATE_DEFAULT};
 
-  sensor::Sensor *temperature_sensor_;
-  sensor::Sensor *pressure_sensor_;
-  sensor::Sensor *humidity_sensor_;
-  sensor::Sensor *gas_resistance_sensor_;
-  sensor::Sensor *iaq_sensor_;
-  text_sensor::TextSensor *iaq_accuracy_text_sensor_;
-  sensor::Sensor *iaq_accuracy_sensor_;
-  sensor::Sensor *co2_equivalent_sensor_;
-  sensor::Sensor *breath_voc_equivalent_sensor_;
+  sensor::Sensor *temperature_sensor_{nullptr};
+  sensor::Sensor *pressure_sensor_{nullptr};
+  sensor::Sensor *humidity_sensor_{nullptr};
+  sensor::Sensor *gas_resistance_sensor_{nullptr};
+  sensor::Sensor *iaq_sensor_{nullptr};
+  text_sensor::TextSensor *iaq_accuracy_text_sensor_{nullptr};
+  sensor::Sensor *iaq_accuracy_sensor_{nullptr};
+  sensor::Sensor *co2_equivalent_sensor_{nullptr};
+  sensor::Sensor *breath_voc_equivalent_sensor_{nullptr};
 };
 #endif
 }  // namespace bme680_bsec
diff --git a/esphome/components/bmp280/bmp280.h b/esphome/components/bmp280/bmp280.h
index f8646fb547..96eb470155 100644
--- a/esphome/components/bmp280/bmp280.h
+++ b/esphome/components/bmp280/bmp280.h
@@ -81,8 +81,8 @@ class BMP280Component : public PollingComponent, public i2c::I2CDevice {
   BMP280Oversampling temperature_oversampling_{BMP280_OVERSAMPLING_16X};
   BMP280Oversampling pressure_oversampling_{BMP280_OVERSAMPLING_16X};
   BMP280IIRFilter iir_filter_{BMP280_IIR_FILTER_OFF};
-  sensor::Sensor *temperature_sensor_;
-  sensor::Sensor *pressure_sensor_;
+  sensor::Sensor *temperature_sensor_{nullptr};
+  sensor::Sensor *pressure_sensor_{nullptr};
   enum ErrorCode {
     NONE = 0,
     COMMUNICATION_FAILED,
diff --git a/esphome/components/bmp3xx/bmp3xx.h b/esphome/components/bmp3xx/bmp3xx.h
index ab20abfe9b..d3b15f601d 100644
--- a/esphome/components/bmp3xx/bmp3xx.h
+++ b/esphome/components/bmp3xx/bmp3xx.h
@@ -125,8 +125,8 @@ class BMP3XXComponent : public PollingComponent, public i2c::I2CDevice {
   Oversampling pressure_oversampling_{OVERSAMPLING_X16};
   IIRFilter iir_filter_{IIR_FILTER_OFF};
   OperationMode operation_mode_{FORCED_MODE};
-  sensor::Sensor *temperature_sensor_;
-  sensor::Sensor *pressure_sensor_;
+  sensor::Sensor *temperature_sensor_{nullptr};
+  sensor::Sensor *pressure_sensor_{nullptr};
   enum ErrorCode {
     NONE = 0,
     ERROR_COMMUNICATION_FAILED,
diff --git a/esphome/components/dht12/dht12.h b/esphome/components/dht12/dht12.h
index ae4d4fd607..2a706039ba 100644
--- a/esphome/components/dht12/dht12.h
+++ b/esphome/components/dht12/dht12.h
@@ -20,8 +20,8 @@ class DHT12Component : public PollingComponent, public i2c::I2CDevice {
  protected:
   bool read_data_(uint8_t *data);
 
-  sensor::Sensor *temperature_sensor_;
-  sensor::Sensor *humidity_sensor_;
+  sensor::Sensor *temperature_sensor_{nullptr};
+  sensor::Sensor *humidity_sensor_{nullptr};
 };
 
 }  // namespace dht12
diff --git a/esphome/components/dps310/dps310.h b/esphome/components/dps310/dps310.h
index 7aca2c3d10..50e7d93c8a 100644
--- a/esphome/components/dps310/dps310.h
+++ b/esphome/components/dps310/dps310.h
@@ -53,8 +53,8 @@ class DPS310Component : public PollingComponent, public i2c::I2CDevice {
   void calculate_values_(int32_t raw_temperature, int32_t raw_pressure);
   static int32_t twos_complement(int32_t val, uint8_t bits);
 
-  sensor::Sensor *temperature_sensor_;
-  sensor::Sensor *pressure_sensor_;
+  sensor::Sensor *temperature_sensor_{nullptr};
+  sensor::Sensor *pressure_sensor_{nullptr};
   int32_t raw_pressure_, raw_temperature_, c00_, c10_;
   int16_t c0_, c1_, c01_, c11_, c20_, c21_, c30_;
   uint8_t prod_rev_id_;
diff --git a/esphome/components/ens210/ens210.h b/esphome/components/ens210/ens210.h
index 342be04799..0fb6ff634d 100644
--- a/esphome/components/ens210/ens210.h
+++ b/esphome/components/ens210/ens210.h
@@ -31,8 +31,8 @@ class ENS210Component : public PollingComponent, public i2c::I2CDevice {
   bool set_low_power_(bool enable);
   void extract_measurement_(uint32_t val, int *data, int *status);
 
-  sensor::Sensor *temperature_sensor_;
-  sensor::Sensor *humidity_sensor_;
+  sensor::Sensor *temperature_sensor_{nullptr};
+  sensor::Sensor *humidity_sensor_{nullptr};
 };
 
 }  // namespace ens210
diff --git a/esphome/components/hdc1080/hdc1080.h b/esphome/components/hdc1080/hdc1080.h
index 9cb87cdb8b..2ff7b6dc33 100644
--- a/esphome/components/hdc1080/hdc1080.h
+++ b/esphome/components/hdc1080/hdc1080.h
@@ -21,8 +21,8 @@ class HDC1080Component : public PollingComponent, public i2c::I2CDevice {
   float get_setup_priority() const override;
 
  protected:
-  sensor::Sensor *temperature_;
-  sensor::Sensor *humidity_;
+  sensor::Sensor *temperature_{nullptr};
+  sensor::Sensor *humidity_{nullptr};
 };
 
 }  // namespace hdc1080
diff --git a/esphome/components/hmc5883l/hmc5883l.h b/esphome/components/hmc5883l/hmc5883l.h
index 41d41baa22..3481f45dc8 100644
--- a/esphome/components/hmc5883l/hmc5883l.h
+++ b/esphome/components/hmc5883l/hmc5883l.h
@@ -54,10 +54,10 @@ class HMC5883LComponent : public PollingComponent, public i2c::I2CDevice {
   HMC5883LOversampling oversampling_{HMC5883L_OVERSAMPLING_1};
   HMC5883LDatarate datarate_{HMC5883L_DATARATE_15_0_HZ};
   HMC5883LRange range_{HMC5883L_RANGE_130_UT};
-  sensor::Sensor *x_sensor_;
-  sensor::Sensor *y_sensor_;
-  sensor::Sensor *z_sensor_;
-  sensor::Sensor *heading_sensor_;
+  sensor::Sensor *x_sensor_{nullptr};
+  sensor::Sensor *y_sensor_{nullptr};
+  sensor::Sensor *z_sensor_{nullptr};
+  sensor::Sensor *heading_sensor_{nullptr};
   enum ErrorCode {
     NONE = 0,
     COMMUNICATION_FAILED,
diff --git a/esphome/components/honeywellabp/honeywellabp.h b/esphome/components/honeywellabp/honeywellabp.h
index 44d5952ca6..98f6f08c4a 100644
--- a/esphome/components/honeywellabp/honeywellabp.h
+++ b/esphome/components/honeywellabp/honeywellabp.h
@@ -29,8 +29,8 @@ class HONEYWELLABPSensor : public PollingComponent,
   uint8_t status_ = 0;         // byte to hold status information.
   int pressure_count_ = 0;     // hold raw pressure data (14 - bit, 0 - 16384)
   int temperature_count_ = 0;  // hold raw temperature data (11 - bit, 0 - 2048)
-  sensor::Sensor *pressure_sensor_;
-  sensor::Sensor *temperature_sensor_;
+  sensor::Sensor *pressure_sensor_{nullptr};
+  sensor::Sensor *temperature_sensor_{nullptr};
   uint8_t readsensor_();
   uint8_t readstatus_();
   int rawpressure_();
diff --git a/esphome/components/ms5611/ms5611.h b/esphome/components/ms5611/ms5611.h
index b5663ad736..476db79612 100644
--- a/esphome/components/ms5611/ms5611.h
+++ b/esphome/components/ms5611/ms5611.h
@@ -22,8 +22,8 @@ class MS5611Component : public PollingComponent, public i2c::I2CDevice {
   void read_pressure_(uint32_t raw_temperature);
   void calculate_values_(uint32_t raw_temperature, uint32_t raw_pressure);
 
-  sensor::Sensor *temperature_sensor_;
-  sensor::Sensor *pressure_sensor_;
+  sensor::Sensor *temperature_sensor_{nullptr};
+  sensor::Sensor *pressure_sensor_{nullptr};
   uint16_t prom_[6];
 };
 
diff --git a/esphome/components/pzem004t/pzem004t.h b/esphome/components/pzem004t/pzem004t.h
index f4f9f29b4d..e18413f35c 100644
--- a/esphome/components/pzem004t/pzem004t.h
+++ b/esphome/components/pzem004t/pzem004t.h
@@ -23,10 +23,10 @@ class PZEM004T : public PollingComponent, public uart::UARTDevice {
   void dump_config() override;
 
  protected:
-  sensor::Sensor *voltage_sensor_;
-  sensor::Sensor *current_sensor_;
-  sensor::Sensor *power_sensor_;
-  sensor::Sensor *energy_sensor_;
+  sensor::Sensor *voltage_sensor_{nullptr};
+  sensor::Sensor *current_sensor_{nullptr};
+  sensor::Sensor *power_sensor_{nullptr};
+  sensor::Sensor *energy_sensor_{nullptr};
 
   enum PZEM004TReadState {
     SET_ADDRESS = 0xB4,
diff --git a/esphome/components/pzemac/pzemac.h b/esphome/components/pzemac/pzemac.h
index e9f76972a3..8f2cf1460d 100644
--- a/esphome/components/pzemac/pzemac.h
+++ b/esphome/components/pzemac/pzemac.h
@@ -27,12 +27,12 @@ class PZEMAC : public PollingComponent, public modbus::ModbusDevice {
 
  protected:
   template<typename... Ts> friend class ResetEnergyAction;
-  sensor::Sensor *voltage_sensor_;
-  sensor::Sensor *current_sensor_;
-  sensor::Sensor *power_sensor_;
-  sensor::Sensor *energy_sensor_;
-  sensor::Sensor *frequency_sensor_;
-  sensor::Sensor *power_factor_sensor_;
+  sensor::Sensor *voltage_sensor_{nullptr};
+  sensor::Sensor *current_sensor_{nullptr};
+  sensor::Sensor *power_sensor_{nullptr};
+  sensor::Sensor *energy_sensor_{nullptr};
+  sensor::Sensor *frequency_sensor_{nullptr};
+  sensor::Sensor *power_factor_sensor_{nullptr};
 
   void reset_energy_();
 };
diff --git a/esphome/components/pzemdc/pzemdc.h b/esphome/components/pzemdc/pzemdc.h
index d838eb4167..a78a48a6fb 100644
--- a/esphome/components/pzemdc/pzemdc.h
+++ b/esphome/components/pzemdc/pzemdc.h
@@ -22,11 +22,11 @@ class PZEMDC : public PollingComponent, public modbus::ModbusDevice {
   void dump_config() override;
 
  protected:
-  sensor::Sensor *voltage_sensor_;
-  sensor::Sensor *current_sensor_;
-  sensor::Sensor *power_sensor_;
-  sensor::Sensor *frequency_sensor_;
-  sensor::Sensor *power_factor_sensor_;
+  sensor::Sensor *voltage_sensor_{nullptr};
+  sensor::Sensor *current_sensor_{nullptr};
+  sensor::Sensor *power_sensor_{nullptr};
+  sensor::Sensor *frequency_sensor_{nullptr};
+  sensor::Sensor *power_factor_sensor_{nullptr};
 };
 
 }  // namespace pzemdc
diff --git a/esphome/components/qmc5883l/qmc5883l.h b/esphome/components/qmc5883l/qmc5883l.h
index 01697ecbd0..15ef435ce5 100644
--- a/esphome/components/qmc5883l/qmc5883l.h
+++ b/esphome/components/qmc5883l/qmc5883l.h
@@ -45,10 +45,10 @@ class QMC5883LComponent : public PollingComponent, public i2c::I2CDevice {
   QMC5883LDatarate datarate_{QMC5883L_DATARATE_10_HZ};
   QMC5883LRange range_{QMC5883L_RANGE_200_UT};
   QMC5883LOversampling oversampling_{QMC5883L_SAMPLING_512};
-  sensor::Sensor *x_sensor_;
-  sensor::Sensor *y_sensor_;
-  sensor::Sensor *z_sensor_;
-  sensor::Sensor *heading_sensor_;
+  sensor::Sensor *x_sensor_{nullptr};
+  sensor::Sensor *y_sensor_{nullptr};
+  sensor::Sensor *z_sensor_{nullptr};
+  sensor::Sensor *heading_sensor_{nullptr};
   enum ErrorCode {
     NONE = 0,
     COMMUNICATION_FAILED,
diff --git a/esphome/components/qmp6988/qmp6988.h b/esphome/components/qmp6988/qmp6988.h
index ef944ba4ff..f0c11adf43 100644
--- a/esphome/components/qmp6988/qmp6988.h
+++ b/esphome/components/qmp6988/qmp6988.h
@@ -91,8 +91,8 @@ class QMP6988Component : public PollingComponent, public i2c::I2CDevice {
 
  protected:
   qmp6988_data_t qmp6988_data_;
-  sensor::Sensor *temperature_sensor_;
-  sensor::Sensor *pressure_sensor_;
+  sensor::Sensor *temperature_sensor_{nullptr};
+  sensor::Sensor *pressure_sensor_{nullptr};
 
   QMP6988Oversampling temperature_oversampling_{QMP6988_OVERSAMPLING_16X};
   QMP6988Oversampling pressure_oversampling_{QMP6988_OVERSAMPLING_16X};
diff --git a/esphome/components/sht3xd/sht3xd.h b/esphome/components/sht3xd/sht3xd.h
index 3164aa0687..41ca3c5d6e 100644
--- a/esphome/components/sht3xd/sht3xd.h
+++ b/esphome/components/sht3xd/sht3xd.h
@@ -19,8 +19,8 @@ class SHT3XDComponent : public PollingComponent, public sensirion_common::Sensir
   void update() override;
 
  protected:
-  sensor::Sensor *temperature_sensor_;
-  sensor::Sensor *humidity_sensor_;
+  sensor::Sensor *temperature_sensor_{nullptr};
+  sensor::Sensor *humidity_sensor_{nullptr};
 };
 
 }  // namespace sht3xd
diff --git a/esphome/components/shtcx/shtcx.h b/esphome/components/shtcx/shtcx.h
index c44fb9d9c1..084d3bfc35 100644
--- a/esphome/components/shtcx/shtcx.h
+++ b/esphome/components/shtcx/shtcx.h
@@ -26,8 +26,8 @@ class SHTCXComponent : public PollingComponent, public sensirion_common::Sensiri
  protected:
   SHTCXType type_;
   uint16_t sensor_id_;
-  sensor::Sensor *temperature_sensor_;
-  sensor::Sensor *humidity_sensor_;
+  sensor::Sensor *temperature_sensor_{nullptr};
+  sensor::Sensor *humidity_sensor_{nullptr};
 };
 
 }  // namespace shtcx
diff --git a/esphome/components/tsl2591/tsl2591.h b/esphome/components/tsl2591/tsl2591.h
index d82dbc395f..5b7eea35ec 100644
--- a/esphome/components/tsl2591/tsl2591.h
+++ b/esphome/components/tsl2591/tsl2591.h
@@ -245,10 +245,10 @@ class TSL2591Component : public PollingComponent, public i2c::I2CDevice {
 
  protected:
   const char *name_;
-  sensor::Sensor *full_spectrum_sensor_;
-  sensor::Sensor *infrared_sensor_;
-  sensor::Sensor *visible_sensor_;
-  sensor::Sensor *calculated_lux_sensor_;
+  sensor::Sensor *full_spectrum_sensor_{nullptr};
+  sensor::Sensor *infrared_sensor_{nullptr};
+  sensor::Sensor *visible_sensor_{nullptr};
+  sensor::Sensor *calculated_lux_sensor_{nullptr};
   TSL2591IntegrationTime integration_time_;
   TSL2591ComponentGain component_gain_;
   TSL2591Gain gain_;
diff --git a/esphome/components/tx20/tx20.h b/esphome/components/tx20/tx20.h
index 1c617d0674..95a9517227 100644
--- a/esphome/components/tx20/tx20.h
+++ b/esphome/components/tx20/tx20.h
@@ -43,8 +43,8 @@ class Tx20Component : public Component {
 
   std::string wind_cardinal_direction_;
   InternalGPIOPin *pin_;
-  sensor::Sensor *wind_speed_sensor_;
-  sensor::Sensor *wind_direction_degrees_sensor_;
+  sensor::Sensor *wind_speed_sensor_{nullptr};
+  sensor::Sensor *wind_direction_degrees_sensor_{nullptr};
   Tx20ComponentStore store_;
 };