i dont now
They work about as well as a space heater.
Before CHanging the Heater Core, have you tried flushing it? I have a 99' Jimmy and have to do this every year to get my heater to work.
did the heater core start leaking? anyway you should have no problem with the air if you bypass the heater core.
Not very well.
Check coolant level .Then thermostat . Then hearter core
I hope you checked the fuse.
Maybe it's bad. Have you tried changing it? Sound logical to me.
blower motor resistor is burned out
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When my heater didn't work i had to replace my thermostat.
It could be a partially blocked heater core, a faulty heater valve that allows the coolant through the heater core or it could be a faulty water pump.
Can't get my heater to work on my 156