After research it seems I need a thermostat. My car is a 91 Cavalier with 50,000 miles. When I drive the heat works. But when I let off the gas or am sitting at a light the heat turns cold. Does this mean I need a thermostat or is it something else?
2006-10-18 02:43:58 · 8 answers · asked by Anonymous in Cars & Transportation ➔ Maintenance & Repairs
I just had the oil changed last week and they topped off all the fluids so I doubt it's due to low coolant. But I'll check again. Thanks.
2006-10-18 02:47:23 · update #1
Well see, I'm looking for people that have had similar problems. I can change the thermostat myself. What I'm not looking for is a smarta$$
2006-10-18 02:48:30 · update #2
Could be any number of things like, low on coolant(check for leaks), bad heater control valve, weak thermostat, clogged radiator,clogged heater core, worn out or corroded water pump, blender door out of adjustment. Check the obvious 1st which is the low coolant level. Once you are topped off, drive the car and check the heat, if it is good and hot, then you need to find out where the coolant went. It doesnt evaporate. Have the cooling system pressure tested for any leaks. Could just be a loose hose clamp, or it could be a water pump seal beginning to leak. Either way , dont wait for the cold winter to repair it. Do it now. You may want to replace the coolant with fresh antifreeze. Old coolant will become a corrosive over time and eat away the internal parts of your engine.
good luck...........
2006-10-18 03:25:41 · answer #1 · answered by mailbox1024 7 · 1⤊ 0⤋
yes it could be the thermostat. it might be flawed. if it was taken out while changing coolant it might have been damaged. and it's not the service guy fault. if it's a resort type it tends to lose it's elastic characteristics with extended use.
also take a look at the fan that circulates heated air into the car. it might be possible that the airflow is ensured only by the movement of the car (happened to me, only when moving heat entered the car cause it was pushed in by the airflow generated, but not when stopped - fan didn't work)
2006-10-18 03:01:53 · answer #2 · answered by ╠╬╣ 3 · 1⤊ 0⤋
Run engine at idle till it warms up to operating temp,observe temp guage.Feel top hose as its warming,if hose only gets warm or the engine wont get up to operating temp the thermostat isnt working.If hose stays cool and then goes hot quickly the thermostat is ok.
2006-10-18 07:36:09 · answer #3 · answered by frank m 5 · 0⤊ 0⤋
i could desire to available be the thermostat yet i do no longer think of so. usually in case you have a thermostat that's caught open or closed the engine the two won't warmth up or wont cool good. evidently like your automobile is heating and cooling good. it is in all probability your heater administration valve. I in certainty opens and closes letting warm coolant into your heater middle which the air blows in the time of to offer you warm air. yet i could recomend you're taking it to a trusted mechanic and ask his recommend.
2016-10-19 22:35:16 · answer #4 · answered by montesi 4 · 0⤊ 0⤋
ok, all the other answers may help, but first you need to check the heater control valve. This valve is operated off of vacuum. You may have a leak in a vacuum line or a faulty check valve. Hope this helps!
2006-10-18 08:13:50 · answer #5 · answered by mtbman1016 2 · 0⤊ 0⤋
I dont think it could be the thermostat but im not sure what it might be.
2006-10-18 02:51:59 · answer #6 · answered by E 5 · 0⤊ 0⤋
why don't you take the car to a mechanic, where they know what they are doing instead of trying to have everyone on here try to fix your car for you
2006-10-18 02:46:27 · answer #7 · answered by dahorndogd013 4 · 0⤊ 3⤋
the antifreeze might be low.
2006-10-18 02:45:42 · answer #8 · answered by Anonymous · 0⤊ 0⤋