Where is fan relay for heater-ac

it means you have a fiver

Most often caused by a bad fan relay. This is a complicated system. Read the post below and download the GM wiring diagrams. Then check the fuses and relays. All 3 relays must be in perfect working order for the system to work properly.
Car overheats Ricks Free Auto Repair Advice

Yes it's the heater relay. There is no power activating your relay
Replace it

Check for the heater relay. It's an industrial type "fuse".

my acura tl fan turn on when i turn on air conditioning why

there should be a acc relay or it will say compresser relay on fuse box panel or heater relay when you open it

if the fan runs on only one speed, its the blower motor relay.

the clock shouldn't be on the same circuit as the fan, I dunno on that one, but there is a relay for the fan.

the cooling fans on autos require a motor, a power wire , a fuse ..........and




relays. ( look under your hood for a black box with some 1 inch by 1 inch black square relays ) under the cover it will tell you what relay is for the fan.
u can take another relay out of the same relay box and test the fan circuit ( as long as the pins look the same and the relay looks the same
) and plug it in and see if that fixes the problem........if it does, go buy a new relay ( remember to put them back where you got them from)

its either a blown fuse, a bad relay, or the motor finally gave up. try the fuses and relays first

yes there is a fuse & a relay,,also it could be c/c high pressure censer,,,the fans,,one runs off temp sender the other runs of your heater controls,,a/c or defrost,,,,,,hope it helped,,,

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...;-)