Webasto Parking Heater Triggered Alarm

[DamienP]

I decided to try using the parking heater this morning to defrost the van (aftermarket heater) and after about 15 minutes the alarm started sounding.

Has this happened to anyone else before?

Are you supposed to just 'lock' without alarming when the heater is programmed to come on?

 

[ArunAlec]

I guess the increase in internal air pressure caused by the fan could be triggering the alarm. You could try it with a window part open to see if it still occurs. On a still day.