Hi people, the night heater in me Volvo isn’t firing up, the light comes on, but there is nothing there, no whering or owt, any ideas?
Brrrrrr! It’s a bit chilly!
Check for blockage by passenger seat where it draws air in dust will clog it very easily .
Make sure the gearbox is in neutral.
Check thermostat is clear and set 
It is best to run the night heater all year.Fire it up every week to keep the moving parts problem free.