My blower only works on HIGH

Asked by May 11, 2016 at 03:45 PM about the 2010 Ford F-150

Question type: Maintenance & Repair

I have a 2010 Ford F150, Over the past year, the A/C heater blower has
gone from working on all levels, 1 thru 4 to just working on HIGH. I have
replaced my resistor and that did not correct the problem. At the time, I
thought the problem must be something else then since it still worked the
same as with the old resistor. But I have since learned that the resistor is
bypassed on the HIGH setting. So now I'm wondering if the new Resistor is
DOA. Is there any way to check if it's a dud or not? Any other suggestions
on what this could be and how to trouble shoot? BTW, I am not
mechanically inclined. Just like to learn new things and enjoy a good

2 Answers


You will need a couple of things. An ohm meter and the resistance measurements of the contact points for the resistor. The net should explain how to check the resistance of the contact points once out of the vehicle. And yes, the resistor is bypassed with the fan is on high. You should check and make sure the blower motor is working properly, not jammed, or any obstructions preventing the free movement of the blade/fins. Any obstructions or hindrances can blow the resistor quickly. Make sure the resistor was not damaged with it was installed by visually checking it. If you have to install a new resistor, check it with an ohm meter before installing.


The temp control unit is computerized in this year truck what i would is go to the local salvage yard and see if they have one eaither in stock or out in the yard buy it if they do and swap them out. Alot of times when this happens a newer car or truck it is 9 out of times going to be a bad temp control

Your Answer

Add photo

Related Questions

Search Ford F-150 Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Ford F-150 Experts

#1 OJ
Reputation 6,700
#2 dandyoun
Reputation 4,130
#3 tennisshoes
Reputation 2,470
View All

Related Models For Sale

Used Chevrolet Silverado 1500
121 Great Deals out of 5,408 listings starting at $1,593
Used GMC Sierra 1500
153 Great Deals out of 6,518 listings starting at $4,699
Used Dodge Ram 1500
65 Great Deals out of 447 listings starting at $2,900
Used Ford F-250 Super Duty
26 Great Deals out of 450 listings starting at $2,500
Used Toyota Tundra
27 Great Deals out of 677 listings starting at $7,995
Used Toyota Tacoma
28 Great Deals out of 621 listings starting at $4,999
Used Ram 1500
311 Great Deals out of 15,811 listings starting at $710
Used Ford Mustang
8 Great Deals out of 844 listings starting at $4,000
Used Ford Explorer
20 Great Deals out of 892 listings starting at $2,995
Used Nissan Titan
26 Great Deals out of 601 listings starting at $6,495
Used Chevrolet Tahoe
326 listings starting at $6,477
Used Ford Ranger
52 Great Deals out of 278 listings starting at $1,995
Used Chevrolet Colorado
11 Great Deals out of 386 listings starting at $5,804
Used Jeep Wrangler
133 Great Deals out of 1,072 listings starting at $3,495

Used Cars For Sale

2017 Ford F-150 For Sale
1,457 listings starting at $32,099
2016 Ford F-150 For Sale
22 Great Deals out of 2,176 listings starting at $25,987
2015 Ford F-150 For Sale
54 Great Deals out of 374 listings starting at $20,000
2014 Ford F-150 For Sale
93 Great Deals out of 623 listings starting at $16,495
2013 Ford F-150 For Sale
58 Great Deals out of 508 listings starting at $13,982