Ok so this might have been answered on a previous post. But I can't find anything. So I bought a 1987 cherokee. Everything works and runs great except the heater. I can't turn it on.. can't change where it's coming from.. nothing.. I get a slow leak of heat from the defrost but thats it.. any ideas?

 

Sounds like the blower motor isn't working.

 

Would I need to take the dash apart to get to it?

 

No. It's in the engine bay under the coolant bottle.

Air only out defrost is usually a vacuum problem.

 

Thanks.

 

Under the coolant tank, you will see to small plastic tubes come through the fire wall. 1 goes to the hot water valve, the other goes to the vacuum tank. It's not shown in the picture. Get one of those Mity Vac hand pumps. The best money you can spend on a diagnostic tool.

 

had a similar problem with mine. had to replace the blower motor resistor and then when the fan started working again found out it wasnt working like it should so it had to be replaced.

 

Thanks guys. It was the blower and resistor was bad as well

 

Glad you got it working. Not the best time of year to be without heat!

 

Put new parts in. Still nothing. Took dash apart. Switch was bad too