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Blower fan won't come on on the ac side, but it

Blower fan won't come on on the ac side but it works fine on the heater side is it possibly the relay?

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Yes it is possibly if you have such device. Older unit then yes. Newer say last 10 years no .. If you have a volt ohm meter you can check out the motor to make sure high speed works. Which the A/C uses the furnace uses the low speed. Get back with me if you need further assistance. ken

Posted on May 09, 2010

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Posted on Jan 02, 2017

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Fan won't blow on ac, but works on furnace


The fans heat speed is low speed and the cool speed is high speed. High speed is controlled by the fan relay normally open switch, the low speed is controlled by the temperature delay or time delay.
see diagram

18418928-wil0gxehsfojcry3vcxysbjd-5-0.png

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1998 buick century my heater and ac fan only work on high i'm told it's the blower relays where are they located


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Blower fan won't come on on the ac side, but it works fine on the heater side, is it possibly the relay?


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Ac blower motor


Check fuse supplying fan is not blown,
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AC compressor works fine, Blower does not. How do you repair?


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FUSE BOX DETAILS


left to right...
1. empty
2. e flashers
3.horn, brake lights
4.clock, trunk light, inside light, radio
5. rad. cooling fan relay (AC only)
6. right side running lights
7. left side running lights
8. right high beam and indicator
9. left high beam and indicator
10. right low beam
11. left low beam
12. reverse,turn signal and inst panel
13. main and transfer fuel pumps, auxiliary air reg., ox sensor heater
14. license plate and glove box light
15. wipers
16. rear defogger
17. heater blower (no AC)
18. cig lighter
19. rad cooling fan (no AC)
20. Heater blower (AC)
21. rad cooling fan (AC only)
22. empty
23. Ox sensor, idle stabilizer,seat belt warning relay, (Digifant only, control unit, idle boost control, idle boost valve)
24. inst panel lights, heater control lights
25. reading lamps
26. empty
27. empty
28. empty

Hope this helps...;-)

Apr 17, 2009 | 1992 Volkswagen Fox

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1983 Chevrolet Suburban Heater fan not working


Heater blower motor resister is bad, replace, located under dash above heater motor.

Mar 15, 2009 | 1983 Chevrolet Suburban

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Only getting lukewarm air from heater even with new thermostat


1. maybe your ac condenser blower is not working properly
2. slipping ac belt
3. air con compressor hub is sliding due to oil leak

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