Question about 1995 Jeep Cherokee
Doesnt heat up at heater core when its very cold.
There is a vacuum operated control valve in the heater core lines at right rear of engine-the passenger side of engine. If it is closed, no warm coolant will circulate through the heater core. The vacuum signal for it comes from the heater controls at the dash. If the valve is stuck in the closed position, it may need taken off and cleaned or replaced. If the vacuum signal is not working, you may have to pull out the heater control assembly and check that vacuum lines are still plugged into the back of it.
Posted on Jan 24, 2013
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Posted on Jan 02, 2017
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