Heating problem?

[NevoBMW320i]

Hello everyone, I trust you are all in good health.

Yesterday, I drove my own vehicle to a work conference. All is proceeding smoothly during the drive. I certainly activated the heating. I observed that it was not heating up as it typically does; but, I assumed that the low temperatures outside would allow the automobile to warm up eventually. The heating is functioning properly. I adjusted the temperature to 22 degrees. After 90 minutes of driving, it began to emit chilly air from the air conditioning system. The rate seemed equivalent to the fan operating at settings two or three, despite the heating fan being on its lowest level; I found it perplexing. While on the motorway, I preferred not to engage with it. I temporarily deactivated the heating system and subsequently reactivated it. identical. I subsequently elevated the temperature to 24 degrees. Heat was emitted at a gradual rate. Subsequently, it emitted chilly air from the air conditioning unit.


Following a day at the conference, I departed as normal, and a similar occurrence transpired on my journey home.

Can somebody elucidate the current situation? Is there anything I can examine to assist with the diagnosis?

[Needsnewtyres2]

It appears that your vehicle's heating system is not regulating the blend effectively. Several factors that may contribute to this:
Blend door actuator — it operates the flaps that regulate hot and cold air. In the event of malfunction or obstruction, one may experience abrupt cold air or irregular airflow.
If the coolant level is insufficient, the heater core will not receive adequate hot fluid to heat the air.

If the thermostat is not functioning correctly, the engine may fail to attain optimal temperature, resulting in inadequate heater performance.
Conduct a brief inspection: ensure the coolant is replenished and at the appropriate level, then monitor for any atypical sounds near the dashboard (a clicking actuator is a frequent indicator). If the issue persists, the mix door actuator is the probable cause.

[paulh2602601]

Which engine? Which year?

[NevoBMW320i]

Apologies, I neglected to include that.
BMW 330e, 2016

F30 B48 engine

[mrnobady]

Occasionally, you may experience a slight influx of cold air as the air conditioning attempts to cool the cabin under heated conditions.
However, get the cooling system inspected, as it is likely the issue.

[NevoBMW320i]

Are there any guides available for resetting the Blend Door Actuator?

[coolguy]

The hybrid system includes an electric heater, an auxiliary water pump, and a changeover valve to alternate between engine coolant and the electric heater. Thus, it is not as straightforward in a forum post. I would first scan it to determine whether it provides any guidance.

[coolguy]

😊