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heat problem please help !!

571 views 10 replies 5 participants last post by  MJMPC 
#1 ·
So today im driving its really cold out , the jeep is warmed up and the heater is blowing cool air thru the vents , if i press the gas or drive it really hot air comes out , but at a red light the air starts to send cool air thru agian, any ideas what this may be ?
 
#9 ·
You are back flowing air because of the leak and the air will not let the fluids flow because the thermostat gets air behind it. Replace the pump and you won't even need to worry about the thermostat(but not a bad idea to replace it). You could end up with worse issues than no heat if that t stat gets air bound and no coolant flows.
 
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