My heating blows cold after a couple of minutes????
Hi there i have changed the thermostat on my jeep now i have got good heat but i doesn't last long, i have to turn the temperature up because it blows cold after a couple of minute and i end up having it on 29 degree. is there a sensor that needs changing inside the car or is the problem somewhere else. when i do long distance driving i end up turning the system off to keep the bit of heat i get. please help
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Re: my heating blows cold after a couple of minutes????
I dosen't last long either...maybe it's catching!!! Was it making heat before you changed the stat? did you put it in the right way (spring part into engine) Try running it with the cap off and heat on high. there could be air in the heater. Also check that the electric fan is not staying on or coming on too early.
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could be the thermostat if it was just stating to go bad,could also be a vacume problem not letting the door for the ac/heat close all the way for a few min.and if its really cold out like below 35,then its going to take longer to warm up,my jeep takes like around 20 min at idle to warm up.yours could be a case of over cooling in cold weather too ie(electric fans on before it warms up)that would be the thermostatic sensor.
If your heat is hot your system is ok if it is not hot usually a thermistat or lack of coolent is the problem. 4 cyl engines do take a littlte while to heat up. a solution to this problem that I use is to purshase a remote starter its good for the engine and cold morningr about 15 minutes before I leave I start it leaveing the heat on high and blower on full ,its toasty by the time I get in.
sounds like you have a big air pocket in the cooling system that you need to bleed. could also be the thermostat is stuck open & not allowing the engine to build up heat. get a temple stick & mark the thermostat housing & see if the mark dissapears after the engine runs for a few minutes.
The first is normal. Your heater gets its heat from the coolant ciculating in your engine. In order for it to work, the coolant needs time to heat up a bit. This is true of just about every vehicle.
When it gets cold again is the puzzler.
My advice is to check the coolant level in the radiator.
ONLY when the engine has cooled.
If the level is down, there can be times when there isn't enough water to cool the engine, fill the radiator and the heater core. The result is the heater blows cold air and the engine runs hotter than normal.
So check the coolant. Open the cap. Start the engine and top it off.
It is likely that the thermostat has failed and is stuck wide open as a failsafe. This jsut happened to me last week in my VW golf. Your engine will never come up to temperature but as long as the thermostat stays open it will not overheat either. Change the thermostat ASAP in case it the failsafe doesn't keep open and you overheat the engine.