My heater is not blowing hot air (although it does sometimes)

maalca@nbnet.nb.ca

 

Turn keyswitch On, and press Auto & OFF buttons at the same time. The display will present a fault in code. There are previous posts on the code interpretation if you do a search on "climate control" or similar. You could look for posts under my name also and find the correct post.

good luck

 

Will it give a code if the thermostat is bad?

 

No, if engine is running cold there won't be a code stored. You can't make hot air w/o some hot coolant to circulate.

good luck

 

I tried to get a code as you suggest but nothing appears.
Today I left my car idle for less then 5 minutes and when I got home there was steam coming out of the container where it should overflow and it was bubbling in it.
I tried something else, I speed the motor at 2500 rpm and hot air started to come in????????as soon as I got back to idle it turned again to cold air.

 

Your car is low on coolant and may have a bad cylinder head gasket. Any recent overheating incidents? Get some coolant or coolant mix and make sure the system is full of coolant by slowly (very slowly w/ stops to allow air to escape) filling through the radiator w/ engine cold.

W/ engine and coolant cold restart car w/ radiator cap off and look for bubbles in coolant or a sudden coolant overflow from the radiator. If yes, a bad head gasket is very likely.

It could be you're just low on coolant and have a coolant leak somewhere (bad hose, bad water pump, etc).

good luck