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Q: heater on 1999 Mercury Cougar

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
my blower works but it dont get warm. I changed the thermostat.
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
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Here are a couple of articles that will help you:
http://repairpal.com/i-have-no-heat-what-could-be-wrong
http://repairpal.com/weak-or-no-heat-is-it-the-heater-blower
I have the same problem. so far I've replaced the thermostat, heat coil and I'm in the process of replacing the waterpump today. My suggestion is to sell the car. Cougars are worthless, don't get stuck dumping money into it like I have. I owned mine for a month before it went to shit. since then it's been one repair after the next. It hasn't run right 8 out of the 9 months I've owned it. This'll be the last mercury I ever own. Btw the engine isn't getting water through it is your problem. Try what I tried but start with the water pump.
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