I have a 2000 honda accord lx .. 4 cylindar and the heat will only work if im driving. When i come to a stop it will still blow but cold air.. Can Anyone Help Me????

 

Change the t'stat

 

I got a new t-stat and the shop said it was at 160 degrees and now at 180.. but i cant tell much difference.. it seems to get a little warmer on low.. i think i might try something with the heater core now.. ugh

 

OEM T'stat is 195F, not 160 or 180F. However, I doubt this is reason for lack of warm air. A cooler thermostat will result in poorer fuel mileage, increased engine wear, oil contamination, and other bad things. Get an OEM thermostat installed.

Check the heater core valve and make sure it is opening fully when Temp setting is at max. Push/Pull wire may be broken or **** may be damaged. You can open the heater core valve by hand from under the hood.

good luck

good luck

 

[IMG]local://upfiles/22/F00C408AC11242F791FD3871435B3024.gif[/IMG]

 

Angelo, I gotta disagree. The coolant does not have to boil for heat to work. You dont really want boiling in the cooling system. Boiling usually means the radiator cap is not holding the correctpressure.

 

The machanic suggested a coolant flush.. and maybe a new water pump.. What do you guys think????

 

Have you checked the heater valve to make sure the cable is opening & closing the valve properly? Ignition needs to be ON but engine doesnt have to be running.

Heater valve is back towards the firewall on one of the heater hoses. Have someone turn the dial all the way back & forth while you watch for the cable to push/pull on the little lever at the valve.

Cleaning out the cooling system is a goodidea. Some chemical cleaner to dissolve scale. Im not sure the best way to prove it needs that, other than try it & see.

The impeller vanes of the waterpump might be eroded/corroded so it doesnt pump so good. But somehow I dont think thats a very common thing. If you let your coolant get corrosive, theres lots of other components (radiator) that would start leaking first.