Best Answer

my theory is when u accellerate, ur water pupm pumps the water round ur engine at a higher speed than normal. as ur engine is just "tickin over" the pump is still pumpin water round the engine but the engine is working less so produces less heat therefore, water cools by the time it gets to heater matrix as it flows slower. i might be wrong but that's the theory i have had for over a year n im yet to see a different explanation to why it happens.

User Avatar

Wiki User

โˆ™ 2011-09-13 23:43:44
This answer is:
User Avatar
Study guides
See all Study Guides
Create a Study Guide

Add your answer:

Earn +20 pts
Q: Why does a car heater blow cool air when the accelerator pedal is not depressed?
Write your answer...
Related questions

What causes your 1995 Chrysler LeBaron to overheat and heater to blow cold air when you are stopped and cool down and blow hot air when you hit your accelerator?

Your coolant level is low.

Your heater will not blow on your 1996 Ford Contour?

heater will not blow on a 1996 ford contour

Why does your heater not blow out warm air?

if the heater does not blow out warm air change the setting.

Why does the heater not blow air?

The heater does not blow air because it emits infrared rays that have heat molecules within them, thus releasing heat, not blowing it. A heater does not blow air becasue there is no moving air source within the heater. The heater emits infrered rays that cause heat to slowly flow out of the heater.

Why don't your vents blow air in a 98 Tahoe?

directly above ur gas pedal under the dash thers 2 small arms that frequently slide off the heater flaps they need locktiteed back on the heater flaps shaft the locktite prevents this from reacoureing

How will the heater react if the heater core is stopped up?

Your heater will blow cold air only.

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.

In your truck when you switch from cold air to heat the air still blows cold?

Interior heat uses the engine heat. If the engine is still cold, the heater will blow cold. If the engine is warm and the heater is blowing cold, you have a problem with the heater. Check the water in the radiator and see if it is rusty. If it is rusty, change your coolant, thermostat, and hoses. Look at the heater hoses when someone steps down on the gas pedal. If a hose collapses, replace your heater hoses. Otherwise take it to a mechanic.

Heater does not blow hot all relays are good?

Check the thermostat or heater core

Why does your heater not blow hard on 2004 530i?

why doesnt my heater work on my1985 BMW

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 does the heater blow heat while driving and cold at idle?

you need to replace your heater core

Why would hot steam blow from the heater vents?

Leak in heater core. Replace core.

How can you tell if heater blower is not working?

it wont blow heat itll blow cold air

What would cause a vehicle heater to blow warm air when blower on low but blow cold when blower turned up?

Poor coolant circulation from a plugged up heater core. Try flushing the heater core and replacing the thermostat.

How do you fix your heater so it will blow out air?

If the heater fails to "blow," then the fan motor (situated on the fire wall inside the engine compartment) is disconnected or has failed and should be reconnected or replaced. But, before either of those, check the heater fan fuse, replace if blown, and re-try the heater.

Why would you smell antifreeze and heater blow cold air?

heater core possibly plugged and leaking

1998 Oldsmobile cutlass heater will not blow hot air?

May be a defective thermostat or heater core

Why won't my heater blow on my 1993 Buick Roadmaster?

flush the heater core in both directions with water

Should your friend be depressed at age 13 or is it attention seeking?

You can be depressed at that age. It just depends on how your life is affected. If they are looking for attention, this will blow over soon.

What does it mean when you blow heater hoses?

To blow a Heater hose means for example popping a balloon, the balloon blew other words the hose leaks and is no longer useful.

What could cause the heater or defrost to NOT blow warm or hot in a 1988 Ford Bronco ll?

Blocked heater core, faulty heater valve, disconnected connection to the heater valve.

How do you fix a heater that quit on a 1999 Chevy Tracker?

When you have the heater on, does it just blow any air at all? or no air?

Why does heater in a 2000 Dodge Neon only blow cold air?

you may not have the heater water hoses plugged in

Why is your heater blowing out warm air in your 1990 buick regal?

Isn't a heater supposed to blow warm air?