Question about Ford F-150
I have a 1998 ford f150 that heater and air wont work on. I have replaced resistor and all fuses are good. Blower motor works when directly checked with jumper cables. Also blower speed wont change. Any suggestions?
Sounds like the control module is bad. The old ones worked off vacuum. Pull the module out and check it out.
Posted on Nov 18, 2014
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Posted on Jan 02, 2017
Motor is also energized by a relay. check that and also check that the motor itself is good by running a hot lead right to it. I'm sure you already checked the fuse and know the switch is good?
Posted on Jul 20, 2009
SOURCE: blower motor does not work
I had the same problem, replace, replace, replace. Check, check and recheck. What I found was the blower motor resistor, located in the blower squirrel cage area, two prongs and a curly wire, was bad. Took the new one back, (it ohmed out okay, continuity ok, all ok!) replaced it with another, and Bingo, problem solved. Frustrating to say the least. After two relays and a blower switch, and test, test and retest. It was a faulty resistor. Made in Mexico. And no guarentee, even though new, it works. Trial and error. Even the dealer parts are Honcho en Mexico. Thanks NAFTA. You gonna make us all welfare babies.
Posted on Sep 28, 2009
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