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2010 ford f150 radiator fan stays on

2010 ford f150 radiator fan stays on 2010 Ford F150, Radiator fan seems to be running on high more than it should. Fan kicks on about 30 seconds after vehicle is started and is extremely loud. Even kicks on when its a cooler day. Also stays on when driving down the highway. Thought the fan was supposed to kick on when it reached a certain temperature then goes off once the temp drops. Switched out the high and low speed relays and did no good. I also noticed on the highway about a 30-40 minute drive the A/C was not blowing as cold as it should that I started sweating. Does blow cold when driving around town at low speeds or even just sitting there. Not sure if the continuously running fan and A/C not blowing as cold as it should are tied together.

Asked by: Guest | Views: 284
Total answers/comments: 3
mcgyver89 [Entry]

Seen this on a few other forums. We had done everything we could think of. Replaced water pump, flushed coolant system and had serviced, replaced the ac sensor that one guys said worked for him, nothing seemed to work. Had another problem pop up and suggested fix for that was replacing fuse #27 under the hood. Pulled out fuse #27 and it was burnt on one end but not broken. Replaced it and haven’t had the loud jet engine fan noise in 2 weeks, even with warmer weather the past three days. Good luck!
mcgyver89 [Entry]

I had the same problem with the fan running continuously even on cold days. I had a very good mechanic that I work with put his computer on my truck to diagnose it. It said my air conditioning line was putting out 496 pounds. He said it's my air pressure sensor that's is causing issue. When we unplugged it the fan turned off. I'm going to get the part tomorrow. None of the auto parts places had it so I have to get it from the Ford dealership. It's about $30.00. I'm hoping this solves my problem on my 2014 F-150 with the 5.0. It's an easy fix. Unplug the wire, unscrew the valve and replace.
mcgyver89 [Entry]

Coolant temp sensor. Bad