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Old 10 Jan 2011, 01:01 am
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Join Date: Nov 2010
Posts: 3
Default Honda civic heater 97 problem?

At first i thought the problem would come from the heater control valve, i took it out bought another one and replaced it and still the heater does not work.

any suggestions on what it might be?

the lever for the climate control doesnt go all the way to very cold if that helps

it is a honda civic hx 1997
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Old 10 Jan 2011, 01:16 am
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Join Date: Aug 2007
Posts: 1,338

The temperature lever may be an indication that the door inside the heater box (under the right side of the dash) is not moving to direct the air over the heater core. If the air isn't routed over the heater core then you won't have any heat.

take the panel that is under the glove box off and look up. you'll see the big black heater box. on the driver's side there should be the terminal end of the cable for the temperature control. you should be able to move the lever on the temperature control in the dash with your left hand while you watch for movement on the 'working end'. that will identify the heater door lever on the heater box. . Note: the cable will end on a "T" shaped lever that has one side connected to the cable and a second connection to the slotted door lever. once you've located it, try to move the lever manually in the direction that the cable pushes it when you move the temp lever to "full hot". if the lever doesn't move easily, disconnect the cable end on the heater control valve you just replaced and try again to move the door under the dash. if the door opens, reconnect your hot water valve, then start the engine, run the car to normal temp and see if you have heat. if so, the problem is with the temp cable to the door or with the door binding. if not, then check the temp of the heater hoses under the hood to see if you have hot water going into and coming out of the heater core. if you don't then you have a problem with coolant circulation or a bad thermostat.

hope that helps
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