diff --git a/esphome/components/duty_time/duty_time_sensor.h b/esphome/components/duty_time/duty_time_sensor.h
index d9fb2a6d604..d21802ebb6c 100644
--- a/esphome/components/duty_time/duty_time_sensor.h
+++ b/esphome/components/duty_time/duty_time_sensor.h
@@ -41,9 +41,9 @@ class DutyTimeSensor : public sensor::Sensor, public PollingComponent {
   sensor::Sensor *last_duty_time_sensor_{nullptr};
   ESPPreferenceObject pref_;
 
-  uint32_t total_sec_;
-  uint32_t last_time_;
-  uint32_t edge_time_;
+  uint32_t total_sec_{0};
+  uint32_t last_time_{0};
+  uint32_t edge_time_{0};
   bool last_state_{false};
   bool restore_;
 };
diff --git a/esphome/components/growatt_solar/growatt_solar.h b/esphome/components/growatt_solar/growatt_solar.h
index b0ddd4b99d8..833d6a36ddb 100644
--- a/esphome/components/growatt_solar/growatt_solar.h
+++ b/esphome/components/growatt_solar/growatt_solar.h
@@ -56,8 +56,8 @@ class GrowattSolar : public PollingComponent, public modbus::ModbusDevice {
   }
 
  protected:
-  bool waiting_to_update_;
-  uint32_t last_send_;
+  bool waiting_to_update_{false};
+  uint32_t last_send_{0};
 
   struct GrowattPhase {
     sensor::Sensor *voltage_sensor_{nullptr};
diff --git a/esphome/components/hte501/hte501.h b/esphome/components/hte501/hte501.h
index b47daf9157c..7f29885f49d 100644
--- a/esphome/components/hte501/hte501.h
+++ b/esphome/components/hte501/hte501.h
@@ -18,8 +18,8 @@ class HTE501Component : public PollingComponent, public i2c::I2CDevice {
   void update() override;
 
  protected:
-  sensor::Sensor *temperature_sensor_;
-  sensor::Sensor *humidity_sensor_;
+  sensor::Sensor *temperature_sensor_{nullptr};
+  sensor::Sensor *humidity_sensor_{nullptr};
 
   enum ErrorCode { NONE = 0, COMMUNICATION_FAILED, CRC_CHECK_FAILED } error_code_{NONE};
 };
diff --git a/esphome/components/select/select_call.h b/esphome/components/select/select_call.h
index c9abbc69a0b..fbe7b82e929 100644
--- a/esphome/components/select/select_call.h
+++ b/esphome/components/select/select_call.h
@@ -43,7 +43,7 @@ class SelectCall {
   Select *const parent_;
   optional<size_t> index_;
   SelectOperation operation_{SELECT_OP_NONE};
-  bool cycle_;
+  bool cycle_{false};
 };
 
 }  // namespace esphome::select
diff --git a/esphome/components/uponor_smatrix/uponor_smatrix.h b/esphome/components/uponor_smatrix/uponor_smatrix.h
index bd760f0d77d..bd20e9b6a0a 100644
--- a/esphome/components/uponor_smatrix/uponor_smatrix.h
+++ b/esphome/components/uponor_smatrix/uponor_smatrix.h
@@ -89,8 +89,8 @@ class UponorSmatrixComponent : public uart::UARTDevice, public Component {
 
   std::vector<uint8_t> rx_buffer_;
   std::queue<std::vector<uint8_t>> tx_queue_;
-  uint32_t last_rx_;
-  uint32_t last_tx_;
+  uint32_t last_rx_{0};
+  uint32_t last_tx_{0};
 
 #ifdef USE_TIME
   time::RealTimeClock *time_id_{nullptr};
diff --git a/esphome/components/wifi_info/wifi_info_text_sensor.h b/esphome/components/wifi_info/wifi_info_text_sensor.h
index 8ef35a5f5d1..7ade170c022 100644
--- a/esphome/components/wifi_info/wifi_info_text_sensor.h
+++ b/esphome/components/wifi_info/wifi_info_text_sensor.h
@@ -23,7 +23,7 @@ class IPAddressWiFiInfo final : public Component, public text_sensor::TextSensor
                    const network::IPAddress &dns2) override;
 
  protected:
-  std::array<text_sensor::TextSensor *, 5> ip_sensors_;
+  std::array<text_sensor::TextSensor *, 5> ip_sensors_{};
 };
 
 class DNSAddressWifiInfo final : public Component, public text_sensor::TextSensor, public wifi::WiFiIPStateListener {
diff --git a/esphome/components/x9c/x9c.h b/esphome/components/x9c/x9c.h
index 66c3df14e19..7dcd79bb7ce 100644
--- a/esphome/components/x9c/x9c.h
+++ b/esphome/components/x9c/x9c.h
@@ -25,9 +25,9 @@ class X9cOutput : public output::FloatOutput, public Component {
   InternalGPIOPin *cs_pin_;
   InternalGPIOPin *inc_pin_;
   InternalGPIOPin *ud_pin_;
-  float initial_value_;
-  float pot_value_;
-  int step_delay_;
+  float initial_value_{0.0f};
+  float pot_value_{0.0f};
+  int step_delay_{0};
 };
 
 }  // namespace x9c