1995 chev. cavallier dosn't push out heat, only cold air
I bought a used chev cavalier and I notice that only cold air comes out of the heater vents instead of hot. I thought It might be the thermostat or perhapse the heater coil..the thing DOES push out air at proper low med. and high settings. so my question is if it is the thermostat....Where is it located so I may switch it out if it might be the problem,same Q if its the heater coil..........ALSO I notice that the engine temprature guage doesn't seem to go above 100 dagrees. the previous owner said" it works and does go higher if you let it sit awhile ".but I drove about 40 miles to a town and it never got above 100(lowest temp on the guage)it has been minus to single degrees in temp outside...is that normal?
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Re: 1995 chev. cavallier dosn't push out heat, only cold...
EVen with the temps as they have been you should be able to get to "operating temperature". Yes the thermostat is probably stuck open. Follow the top radiator hose to the water neck on the engine. There you will find 2 bolts holding the water neck in place. With the engine off and cold, release the radiator cap slowly. Then take the two bolts out. Remove the hose out of the way and there you will find a poppet thermostst. Pull it up and replace it with the new one. ( I always test my new ones in a pot of boiling water to ensure they work properly) Clean the mating surfaces, andf reinstall in the reverse order.
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If there is cold air coming out the vents than its not a thermostat. The thermostat gullets the temperature of the engine not the temp of the heater which bypasses the thermostat.
If there is never any heat out the vents than there are two possibilities. The coolant level is to low. The first thing you will notice if the coolant level gets to low is the lack of heat out t
first in this problem you need to look for cheapest things to do which is start with you thermostat abd make sure its open and close by how much temp inside the eng. then u need to feel the input hose and the output hose which they come from the heater core they should have closely same temp . if there is non of them have any heat thats mean the water pump blower is broke and u have to replace the water pump, if one of the heater core hose hot and the other cold the problem in the heater core , about the A/C light is on the A/C comprasser shoul work with the heat becuase hot air + cold air = dry air which u need for ur front DEF
Did you let engine run from cold after refill, with rad cap off & heater on (not defrost) until the engine reached operating temperature and rad fan came on a few times? If not, try it, you may just have an air lock, provided your sure thermostat is correct one & back in correct way. Rev engine slightly every once in a while and hold it there for approx 10-20 seconds to help burp the air out & increase circulation to heater.
You should take a look at heat gauge on thecar, If its comming up to tempature you can rule out the thermostat, Check the coolant level to. If all these are fine,
Your looking at these possibilitys*sp
A. Heater Core has broke -Can you smell coolant with the heating sys on? B- BDA has broken and not opening the blend door to allow heat in Best way to check that is to change from Vent to something else and see if the air comes out of those or just sticks in the same place
And it also makes a click click noise sometimes.
Also check to see if coolant is flowing round might be an air block somewhere.