Ford Mustang Forum - View Single Post - 2003 mustang keeps going through thermostats
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post #1 of (permalink) Old 02-22-2011 Thread Starter
fladug
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Joined: Feb 2011
Location: southeast
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2003 mustang keeps going through thermostats

About every 6 months the thermostat goes bad. The temp gauge will rise almost to the red and not blow any hot air with heater on , then temp gauge will fall and hot air starts coming out. It will do this over and over till I get it home. After I change the thermostat it will work fine for about 6 months then do it all over again. I have bought the best thermostats I could buy, does anybody know what could be causing this? Also , when it starts doing this the transmission starts downshifting hard. I dont know if they are related but it seems to do it everytime the thermostat acts up.

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