diff --git a/esphome/components/hmc5883l/hmc5883l.h b/esphome/components/hmc5883l/hmc5883l.h
index 8eae0f7a50..b5cf93e62b 100644
--- a/esphome/components/hmc5883l/hmc5883l.h
+++ b/esphome/components/hmc5883l/hmc5883l.h
@@ -61,7 +61,7 @@ class HMC5883LComponent : public PollingComponent, public i2c::I2CDevice {
     NONE = 0,
     COMMUNICATION_FAILED,
     ID_REGISTERS,
-  } error_code_;
+  } error_code_{NONE};
   HighFrequencyLoopRequester high_freq_;
 };
 
diff --git a/esphome/components/honeywellabp2_i2c/honeywellabp2.h b/esphome/components/honeywellabp2_i2c/honeywellabp2.h
index 274de847ac..d29ebb855d 100644
--- a/esphome/components/honeywellabp2_i2c/honeywellabp2.h
+++ b/esphome/components/honeywellabp2_i2c/honeywellabp2.h
@@ -45,8 +45,8 @@ class HONEYWELLABP2Sensor : public PollingComponent, public i2c::I2CDevice {
   const float max_count_b_ = 11744051.2;  // (70% of 2^24 counts or 0xB33333)
   const float min_count_b_ = 5033164.8;   // (30% of 2^24 counts or 0x4CCCCC)
 
-  float max_count_;
-  float min_count_;
+  float max_count_{max_count_a_};
+  float min_count_{min_count_a_};
   bool measurement_running_ = false;
 
   uint8_t raw_data_[7];                      // holds output data
diff --git a/esphome/components/max9611/sensor.py b/esphome/components/max9611/sensor.py
index 8405a3f75a..b3a73d8c10 100644
--- a/esphome/components/max9611/sensor.py
+++ b/esphome/components/max9611/sensor.py
@@ -35,7 +35,9 @@ CONFIG_SCHEMA = (
     cv.Schema(
         {
             cv.GenerateID(): cv.declare_id(MAX9611Component),
-            cv.Required(CONF_SHUNT_RESISTANCE): cv.resistance,
+            cv.Required(CONF_SHUNT_RESISTANCE): cv.All(
+                cv.resistance, cv.Range(min=1e-6)
+            ),
             cv.Required(CONF_GAIN): cv.enum(MAX9611_GAIN, upper=True),
             cv.Optional(CONF_VOLTAGE): sensor.sensor_schema(
                 unit_of_measurement=UNIT_VOLT,
diff --git a/esphome/components/mmc5603/mmc5603.h b/esphome/components/mmc5603/mmc5603.h
index f827e27e04..9a77b78bc1 100644
--- a/esphome/components/mmc5603/mmc5603.h
+++ b/esphome/components/mmc5603/mmc5603.h
@@ -27,7 +27,7 @@ class MMC5603Component : public PollingComponent, public i2c::I2CDevice {
   void set_auto_set_reset(bool auto_set_reset) { auto_set_reset_ = auto_set_reset; }
 
  protected:
-  MMC5603Datarate datarate_;
+  MMC5603Datarate datarate_{MMC5603_DATARATE_75_0_HZ};
   sensor::Sensor *x_sensor_{nullptr};
   sensor::Sensor *y_sensor_{nullptr};
   sensor::Sensor *z_sensor_{nullptr};
@@ -37,7 +37,7 @@ class MMC5603Component : public PollingComponent, public i2c::I2CDevice {
     NONE = 0,
     COMMUNICATION_FAILED,
     ID_REGISTERS,
-  } error_code_;
+  } error_code_{NONE};
 };
 
 }  // namespace mmc5603
diff --git a/esphome/components/xgzp68xx/sensor.py b/esphome/components/xgzp68xx/sensor.py
index 2b38392a02..6b83012eb4 100644
--- a/esphome/components/xgzp68xx/sensor.py
+++ b/esphome/components/xgzp68xx/sensor.py
@@ -56,7 +56,7 @@ CONFIG_SCHEMA = (
                 device_class=DEVICE_CLASS_TEMPERATURE,
                 state_class=STATE_CLASS_MEASUREMENT,
             ),
-            cv.Optional(CONF_K_VALUE, default=4096): cv.uint16_t,
+            cv.Optional(CONF_K_VALUE, default=4096): cv.int_range(min=1, max=65535),
         }
     )
     .extend(cv.polling_component_schema("60s"))