my 307 2006 petrol 1.6 the heater fan stops producing hot air

Andrew Hutchings, January 2019

If the fan is still blowing air, but it is cold, first thing to check is the engine coolant level under the bonnet. The interior heater uses hot water from the engine, if your coolant level is extremely low, the first sign will be lack of heat from interior vents.

Rupert, January 2019