Question about 1992 Ford Mustang

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92 Mustang Engine WIll Not Heat

Have a 1992 mustang with the 4 cylinder engine and engine will not run warm enough to generate enough heat to warm the vehicle. I have replaced the thermostat with the warmest one available already. And based on the heat guage barely rising when the engine is running, I doubt the thermostat ever opens up, yet the vehicle still runs cool. I know this is typical of many 4 cylinders vehicles, but any suggestions would be appreciated as winters are cold up here in Canada.

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Reggie, living in the uk, i having never worked on a mustang, but have found this problem on many cars, two thing i can mention here, 1st is the heater matrix (small radiator thingy usually located in front of the fan behind the dashboard)being blocked by limescale or 2nd the stem of your warm cold dial no longer keying with the valve that changes from cold to hot. Since the themostat problem has been address try looking closer at these 2

Posted on Oct 24, 2008

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Sounds like you have partialy blocked heater core,not enough flow to the heater or heater tap either not working or only partialy open.You may have to remove heater hose at the fire wall and flush with garden hose.Also check if heater hoses are clear and running freely by using the same garden hose If you put hose up removed heater hose you should get a strong run of water coming out of the heater radiator.

Posted on Oct 24, 2008

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