1991 honda accord heater switch will not push from cold to hot.m It pushes over about 1 inch and lams. It feels like something is stopping the flat from opening/closing all the way. I do not know how to get into that box where the flap is (near the firewall), to see if something is jammed.
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https://answers.yahoo.com/question/index?qid...Sep 13, 2008 - my 1994 honda accord ex has a problem. the heater vents dont switch ... defroster and feet etc.. none of those work anymore. nether does my AC, ... still no change. they will blow hot and cold air out of the front "in your face" ...
Jul 30, 2013 - Uploaded by Nicolas Alvarez
Honda 98 prelude 5th gen A/C delete H22A New belt size = 37 inches (same as 97 accord) ... New belt size = 37 inches (same as 97 accord) ... How to: 1990 Honda Prelude - Diagnosis Air Conditioning Inop and a Vacuum leak ... Fixing A Car Air Conditioner That Blows Hot Air - Duration: 3:42. by Scotty ...
good the blower works.
it takes 2 more things,
1: hot water, (engine coolant ) at 180F or more holding.
if not fix that first.
2: water flow , if both heater core hoses get hot 180F then the core is hot. and means,
3: no air flow through the core,
dampers failing, or controls. to them.
the most common problem i've seen with these accords are the Hot Water Valve. most likely it is stuck in the closed position, not allowing hot coolant to enter the heater core. You can manually push/move it to the open position. Its under the hood on the heater core inlet hose.
My did this recently. I went into the engine bay. Directly on the middle of the firewall you will see the heater core hose coming off the firewall going to a plastic boxy thing. That thing has a thin black "cable" going to it. It looks like the cable for a bicycle brake. This cable attaches to a metal prong. That prong regulates the hot coolant that goes through the heater core to heat up the air.
Go ahead and push down on the prong that the black "cable" attaches to. It should push down about 1" with minimal force. Dont go putting a million pounds of force on it.
Thats what I did with mine and it stated working. Post up if it worked!
The heater valve is under the hood that lets the hot water into the system where the hoses go into the dash you can push it open with you fingers when its cold-is best, and the mixing door runs off a small motor, Its under the dash on the left side of the center console look around under there you can move them manually too and watch when you turn the switches you should be able to tell which motor or the switch is bad, either way you should be able to manually get the heat on.
heat exchanger not working look under dash find where cable goes from heater controls the hot and cold switch move back and forth to find it its not opening all the way when you move it to hot push it farther by hand this will open the airway for your heater core