My 1999 cougars heater is blowing out cold air. it blows out warm air on setting one but when i put it on 2 or 3 or 4 its cold i am going to get my anti freeze flushed this week and see what happens but i need help also the air contion does not work i just got the car 3 months ago it runs fine but my RPM's Drops and comes back to one and it some times stalls out in the first 10 mins of start i used a computer *** and it read my systems to lean which means im getting to much air which it could be the O2 senors which could be doing the stalling PLz help me to get the Heat back on in my car winter is here....
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Heater core could be bad/clogged, the rust over time and the little gaps could he clogged.. just because the hoses are warm doesn't mean the core isn't clogged.. did u check the temp setting Gage..
You need to verify that warm coolant is getting to the heater core by touching the hoses going into the firewall. If they are both the same temp or close, you might have a blend door actuator broken or sticking that does not direct warm air into cabin area
I had the same problem that I just fix by flushing the heater core out with a hose.
take the two hoses off the fire wall and put the water to it and let flush. my heater is putting out 150 dg. F of hot air. I'm so excited! i will stay warm now.
This is your heater control box its getting stuck so you have to replace it
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