When at speeds of 55 mph and higher,wife says that a/c starts blowing warm air not cold. When car is stopped I can hear the compressor come on when I turn it on. I checked the coolant level and it is ok. Please help! WIFE IS KILLING ME ABOUT BEING HOT ALL THE TIME AND SHE AIN'T DRIVING MY TRUCK!
Sounds like for some reason the valve that regulates coolant flow through your heater core is stuck open (even when your temp. control is all the way counter-clockwise). Look at the valve and try to figure out why it's not closing all the way..Could be a linkage proble, The linkage between the heat control on the dash and the valve could be broken or stuck..Also check the thermostat
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check and make sure the radiator is full of antifreeze take off the radiator cap and top off the radiator then take your hand and cover the hole where the cap goes and squeeze the top radiator hose a few times to help it go down that way if there is a air pocket somewhere it will help push it out when you thank your done top off again and replace the cap and try
You mean PCM most states read the readiness monitors depending on the state on how many they allow not to be completed. The first one on the list that is hard to get run and pass is the EVAP Because this requires the car to be cold and fuel tank must between 15%-85% and both air temp and coolant temp with in 10 degrees of each other. Start car let idle for 5 -10 minutes Then drive car normally no hard accelerations or quick stops bring speed to 50-60 mph and coast down to 20-15 mph without brake pedal input repeat this twice.Then bring speed to 58-62 mph and set cruise control run for 12-16 miles exit freeway caught a red light or stop and idle 2 minutes shut car off rest for 5 minutes and repeat freeway drive. then redo morning cold start again . then have some one test the generic readiness monitors to what needs to run and attempt again. California before 2000 1 can be incomplete after 2000 all have to be completed which is hard some will not run for 800 miles.