03 Honda Accord, problem with heater?
my heater worked all fine, then one Morning i start the car again, and the air heater didn’t work. the seat heaters work, but the AC heater does not work. What could be the possible problems?
i think i checked all the fuses and relays that go to the heater, and they all seem fine.
by the way, yes i can change the fan speeds, but no matter what temp i put them on, it still blows out cold air.
One Response
honda guy
05 Feb 2010
there are two possibilities that come immediately to mind. the first is a question–does the heater blower motor work? can you adjust the fan speed? if not, then the problem is with the blower as a blower motor that doesn’t work will cause the heater control panel not to work.
if the blower motor works, then check the level of coolant in the radiator. if the coolant level is low you may have air trapped in the heater core and that can cause the ‘no heat’ condition. you would have to refill the coolant and have the air bled out of the system
edit 11-20-08
you have a hot water shut-off valve (heater valve) that is probably stuck closed. the valve is in the line to the heater core and has a cable running to it. if the valve is stuck you won’t circulate hot water through the heater core and that will result in no heat. try working the valve manually to see if it will open. it may be a problem with the valve, with the cable or with the control end inside the car
hope that helps