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What is wrong if the air will not blow out at times when the heat or AC is on and you can't even turn the thermostat to the on position and get it to work then it will come on the next time you use it?
Wiki User
∙ 18y ago
The fan relay is going bad...it had about 8 wires on it...it is fairly easy to change and costs about 15 to 20 dollars ...contractor cost...15 min to put in..
Wiki User
∙ 18y ago
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Why would a 1998 Chrysler town and country heater blow cold?
You might check the thermostat. It probably needs replaced. Often times the thermostat will either be stuck in the closed position, causing it to overheat, or in the wide open position causing the heater to blow cold. This is what happened to me. I took the thermostat out and the end was broken off. This made the spring release and be stuck in the wide open position. We were driving over a snowy pass at around 10 pm. NOT a fun trip.
Why does the heater on your 1999 Dodge Ram pu blow coolcold at idle then warm up when the RPM's increase?
Thermostat stuck in the open position. Replace the thermostat.
Your coolant is full in your 2000 Alero and your heater continues to blow cold air out your thermostat is above the half way mark when the heater sometimes works what is wrong?
Probably your thermostat
Can a bad thermostat make ac blow hot air?
No. The thermostat is not likely to be the cause.
When you blow your trumpet no sound comes out What is wrong?
Most likely that a valve is installed backwards, or two (or all three) valves are in the wrong position or you are not vibrating your lips in the correct manner
Why does your air conditioner blow cool air out of your vents when it is on the on position but no air will come out when the thermostat is in the auto position?
A thermostat has an Auto position and an On position for the fan's operation. In the On position the switch between Red circuit on the thermostat and the Green circuit is closed, this energizes a fan relay that closes a normally open switch and energizes high/cool speed. On the other hand, the fan relays normally closed switch will go through a time or temp delay, or time and temp delay, that is what controls low/heat speed fan operation. If in cooling you must use the On position to get the fan to run your thermostats bad.
Your 1997 SC1 Saturn heater works but does not blow hot enough what could be wrong?
Sticking thermostat could cause this. If the thermostat is stuck open, it never gives the engine a chance to fully heat the coolant. Follow the top radiator hose to the engine, remove the hose and remove what it hooks to and there's your thermostat.
How does a car act with a bad thermostat?
If the thermostat is stuck in the CLOSED position, the vehicle will overheat and may cause a lot of damage. If it is stuck in the OPEN positin, the vehicle may not reach normal operating temperature and the heater may only blow warm or cold air.
My heater will blow but not hot ive replaced the thermostat?
Check into the temperature control valve--this is different than the thermostat.
Why would a thermostat run hot and the car heater blow cold air?
Insufficient amount of coolant or thermostat not opening
Can a thermostat cause your car's heater to blow warm air?
Yes.
Why doesn't a 1995 ford explorer get to operating temperature therefore it does not blow warm air with the heater on?
If your coolant level is fine but your engine temperature gauge is reading on the cool side all the time , your thermostat is probably sticking open. ( or you have no thermostat , or the wrong thermostat - one that has too low of a temperature range ) Anybody else have any ideas ?
