Flushed Twice, New coolant, New pump, New thermostat 192', New Fan cluch, overheats when A/C is turned on the Highway but not in City traffic What can be the cause of this
Ford Q&AAsk Your Question
1999 Ford Expedition Question: Over heating when turning A/C on Highway
Answer #1pushrod August 12, 2013, 01:14Master
Turn A/C off and the engine runs cooler at hwy speed? And it works fine in town with A/C on? That's bass ackwards! I'm going to guess, radiator restricted or air in cooling system. Who knows? No fan needed at hwy speed!
Reply915tommyboy74, August 12, 2013, 15:02Rookie
Well that's what I thought heating up on hwy if A/C is turned on runs fine and does not heat up in city stop and go it runs fine
Answer #2Greg's Orange Auto (13211 Answers) , Orange, CA - (714) 361-9386globalhelper August 12, 2013, 06:01Master
poss fan clutch is bad. easy to test while eng is running watch fan and have someone turn off eng, fan should stop in about 3-5 seconds.if its goes past that its most likely bad
Reply915tommyboy74, August 14, 2013, 20:34Rookie
Found the problem, it was the Radiator being Clogged up
Thanks for all the Help
Replypushrod, August 14, 2013, 22:03Master
Glad you found it. Your reply may help others with similar trouble.