very little heat in the car during winter...

[newaccorddriver]

i know this isnt about my accord, but the corolla im driving right now has very little heat coming out of it. i remember when i first started driving it, it was a sauna in there when i turned it up, now its like its dying or something. im guessing its not the water pump going as the engine itself isnt overheating in any way. possible that the heater core might be clogged?

[MessyHonda]

check your coolent level my smart friend had 100% coolent and it did not heat up at all...then he added water and it worked just fine.

[race12001]

yea its possible the heater core is cloged pull off one of your radiator hoses and see if your fluid is slimey if it is you need to flush it

[newaccorddriver]

its not empty or anything, but ill try draining and refilling the rad to see if it helps

[88Accord-DX]

If you heater core isn't clogged, then the thermostat is stuck in the open position.

[newaccorddriver]

If you heater core isn't clogged, then the thermostat is stuck in the open position.

im not sure if that might be it as the car heats up perfectly, even while im driving it. i always thought that if it was stuck open, it wont heat up the car at all?

[ghettogeddy]

we had the same prob in the 89 and it ended up being a clip on the back of the heater controls

[carotman]

It could be the heater core valve that doesn't function anymore. That valve is in the engine bay and it's driven by a cable. Have someone move the temp slider in the car and check if the valve moves freely.

[race12001]

it could be a hundred diffrent things you just need to start some where and work your way down the list though what it could be

[newaccorddriver]

im leaning towards a clogged up heater core cause when its not blowing really hot, i can momentarily the heater off, and when i turn it up again, its blowing hot again. any suggestions on how to unclog it without having to replace it?

[race12001]

take your heater hoseses off and put a blow nozzel on one end and stand out of the way and push it out

[A20A1]

If it's not either of those check your belt, if it's not that then your water pump is shot.

[newaccorddriver]

If it's not either of those check your belt, if it's not that then your water pump is shot.

if the pump was shot, wouldnt the car overheat?

[newaccorddriver]

take your heater hoseses off and put a blow nozzel on one end and stand out of the way and push it out

can i use a hose and blow it with water?

[race12001]

not if its cold out side cause i drive my car with a busted radiator and it only over heats if i sit still but if i keep the air curculating around the engine bay it dont

[88Accord-DX]

Generally on most cars, there is two lines that go through the firewall to the heater core. Inlet & outlet side. You can use a blow gun hooked up to a compressor to try to blow the heater core out. Just unhook both sides, to be safe. Look for a valve on that Corolla like these Accords have when moving the heater controls near the firewall.