You had better changed that thermostat or will be trouble down the line
Either air in the system, or sticking thermostat.
SOURCE: No Heat in 99 Taurus
Just finished fixing my daughters 1999 taurus heat. It would blow warm only when running down the road. At idle it blew cold. I started with replacing thermostat, and water pump because they are the easier fix. Still did not help. Then I replaced the heater core. A daunting job but not that hard to move the dash slighly out of the way to replace. There is a good write up at tarusclub.com. After that, heat was better but at idle, it would still blow cool sometimes. Researched and found answer. Park car on the steepest hill you can find with front of car up. Start car and take off reservoir cap. Let car warm up and keep rpms about 1500. After a while the fluid will come running out of the car and all over the place but it will bring air bubbles with it. Reduce rpm, add more fluid and repeat about 3 times. It will make a mess but after that, the heater works perfectly. We get heat long before the temp gage indicates any and it never blows cold unless you lower the temp.
SOURCE: AC doesn't blow cold air, but refrigerant levels
The low side pressure seems ok the high side would help,Is your compressor cycling and is the air coming out even slightly cool?slight over charge cold effect cooling ability.I wish I could be more help. I will have to think about this one.maybe you could make sure your temp.door is actually in the commanded cold position.
SOURCE: 2003 Lincoln LS V8 3.9.
I dont think the coolant is boiling, I think you have an air bubble in your system wich is causing a air lock and youll need it flushed out. Your reservior cap should be tight always.. never loose this is an air tight system and your allowing it to get air in it. I have a 2002 linc ls and just had to pay 1000.00 to replace the system because I let an air lock go for too long and had so much back pressure I blew up my reservior.
Testimonial: "Thanks a lot. I've changed the coolant reservoir and reservoir cap. now it seems everything is ok with my car. so, your advise was really helpful."
SOURCE: 2002 grand prix gt 3800 blowing hot air on AC.
i need to know how much the relate box and wire and hares is for the ac on a grand prix 2000
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No reason it should've boiled out the reservoir UNLESS you had < 50% antifreeze in the system.
The heater turned cold when the fluid was pushed out of the heater core,maybe.
The air conditioner compressor will come on on defrost or mix mode or AUTO mode.
Put about 60-65% antifreeze mix in there and bleed it so there's no air in system. Tighten the cap and see if it is okay.
There should not be continuous bubbles coming up. don-ohio
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