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Why does your heater only blow hot air when you are pressing the gas and cold air whenyou are not?
MrRik
Has to do with the rpms if it's idle not much power is giving out to the car from the fan belt to get very warm. Say next time you're in your car. Start the car give it a little gas where the rpm is almost at 2 rpms. Same goes for the a/c.
Wiki User
∙ 15y ago
Wiki User
∙ 10y agoPoor circulation from a faulty thermostat or a plugged heater core. Be sure the coolant reservoir is not empty.
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What cause 1993 grand prix se to blow cold air on defroster setting?
A water thermostat stuck open. Air in the heater hose lines (caused by low radiator coolant). Air temperature (mechanical) control cable not opening the heater hose water valve (under hood).
1999 dodge caravan heater blows cold air?
First thing to check is open hood and feel heater hoses going into heater core located on r/s of vehilcle if sitting in driver seat.If they are both very hot and feel the same temp,blend door in heater box is not operating correctly.If one heater hose is hot and the other is cooler than chances are the heater core is plugged.In either case a professional would be your best bet for repair.Hope info was helpful.
What would cause the internal vents to blow cold air when the heat is on?
check both heater hoses under the hood with engine at running temp. if only one hose is hot your heater core is restricted( try flushing it out),m low coolant will also cause no heat since the heat comes from the hot coolkant in the heater core. if both hoaes are hot chances are the blend air door in the interior heat unit is faulty or climate control is not calling for heat.
Why does your heater blow warm air then cold air?
You may have air trapped in the cooling system. Remove rad cap, start engine and let it run for 30 minutes with the cap off while you add coolant as needed. That should do it unless you have a cooling system leak.
92 suburban heater not working the radiator is full and new thermostat?
The most likely cause is an 'Air Lock' in your heater matrix, probably caused when you changed the thermostat. There are 2 ways of dealing with this; Run the engine, with the heater temperature setting on cold, when your engine reaches normal running temperature, open the heater valve to full. This can work sometimes. For this second method, you need the engine cold: Remove the hose that connects from your cylinder head to your heater and raise it fully. Pour some coolant mixture into the end of the pipe, until it flows from the pipe connection. Reattach the pipe and secure in place. Your heater should now work normally. If it doesn't, you may need to replace the water valve or flush the heater matrix.
How will the heater react if the heater core is stopped up?
Your heater will blow cold air only.
Why would a house heater blow out cold air?
It doesn't really blow it out it just warms the cold air.
Why does the heater blow heat while driving and cold at idle?
you need to replace your heater core
How can you tell if heater blower is not working?
it wont blow heat itll blow cold air
Why does Kia Sorento heater blow cold air?
you are low on coolingliquid !
Why would you smell antifreeze and heater blow cold air?
heater core possibly plugged and leaking
Why would a back heater blow cold air and front heater blow hot air in a 2003 Chevrolet Suburban?
The front expansion valve is clogged.
Why does heater in a 2000 Dodge Neon only blow cold air?
you may not have the heater water hoses plugged in
Can a thermostat cause heater in house to blow cold air?
No, not if it's on a heat setting. Most home thermostats have a "Fan" setting that will blow cold air if the attic is cold.
Would straight antifreeze make heater blow cold air?
No! Thermostat.
If the rear heater works ok why does the front heater only blow cold air?
replace front heater corefront and rear have independent heater cores
Why the heater blow cold air on 96 blazer?
the heater core was stopped up just flushed it out ok now
