When I turn my heat on in the car there is no heat just cool air. I cleanned the sensor where my sun roof controls are on the roof but still no change. I changed the thermostat in the summer time due to an overheating issue.

I do not know where to start looking, Please help.

Fab

Fab, check that the auxiliary water pump is working ... it's located near the cooling system expansion tank.

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Fred Hoelzle

How do I check if the auxiliary water pump is working?

Now when I turn my heat on there is Very little blowing out of the vents. I changed to different vents and differnet speeds and still nothing. Could this be the blower motor or relay if there is one and how do I check if the motor is gone and where is it located?

Thanks,

Fab