diff --git a/esphome/components/thermostat/thermostat_climate.cpp b/esphome/components/thermostat/thermostat_climate.cpp
index e830d359c64..f64673e13fa 100644
--- a/esphome/components/thermostat/thermostat_climate.cpp
+++ b/esphome/components/thermostat/thermostat_climate.cpp
@@ -1304,8 +1304,6 @@ void ThermostatClimate::set_default_preset(const char *custom_preset) {
   this->default_custom_preset_ = nullptr;
 }
 
-void ThermostatClimate::set_default_preset(climate::ClimatePreset preset) { this->default_preset_ = preset; }
-
 void ThermostatClimate::set_timer_duration_in_sec_(ThermostatClimateTimerIndex timer_index, uint32_t time) {
   uint32_t new_duration_ms = 1000 * (time < this->min_timer_duration_ ? this->min_timer_duration_ : time);
 
diff --git a/esphome/components/thermostat/thermostat_climate.h b/esphome/components/thermostat/thermostat_climate.h
index 4dc2a74d8e5..b7d46eae227 100644
--- a/esphome/components/thermostat/thermostat_climate.h
+++ b/esphome/components/thermostat/thermostat_climate.h
@@ -92,7 +92,7 @@ class ThermostatClimate final : public climate::Climate, public Component {
   void loop() override;
 
   void set_default_preset(const char *custom_preset);
-  void set_default_preset(climate::ClimatePreset preset);
+  void set_default_preset(climate::ClimatePreset preset) { this->default_preset_ = preset; }
   void set_on_boot_restore_from(thermostat::OnBootRestoreFrom on_boot_restore_from) {
     this->on_boot_restore_from_ = on_boot_restore_from;
   }