Enthusiast
A/C Fan
Hi,
When I put on my air conditioner on high fan after about one minute the fan motor will shut off but all other speeds will still operate. I replaced the fan motor and still have the same problem. Any suggestions on what to look for?
Thanks.
Merrill
1991 Suburban 6.2L 3/4T 4X4 Banks Sidewinder Turbo Frybridized
Enthusiast
Howdy
A few other things to check:
Switch issues in the dash, I cant remember how that model switches but I know in the newer trucks they ran high current through the switch and they had a tendency to burn up.
Resistor pack for fan speed control. This is mounted in the air box and can also cause problems.
Relay pack mounted on top of the air box
Some trucks had a connector for the high speed circuit in the fan wire and it could overheat and become a problem as well.
The high speed circuit is separate from the others and it sounds like yours is heat related due to the current draw.
good luck!
1996 Chvy 3500 CCDWLB 6.5 Heathed, NO vac, marine injctrs, ARB bumper, BIG pipe, 3" lift, bright lights, bypass oil system.
1986 Chvy 6.2 M1009 blazer RAM AIR, Headers, Custom interior
2001 Chinook RV, V10 gas
1974 John Deere 1530 diesel tractor
1993 John Deere 455 Diesel lawn mower
1967 GTO, 1989 Honda Transalp
2009 VW Jetta TDI, flashed and piped, 6speed, fun car!
1998 6.5 suburban, stock, daughter's
1993 6.5 3500 CCSWLB GM8, Heathed, big exhaust, gauges, Son's
1984 6.2 ATS turbo 3500, SCDWLB - Son's
3 kids, 1 wife, 1 dog
Gunsmith, Tactics Instructor, Fabricator USMC 87-93 Semper Fi!
Enthusiast
Exact same issue
Hi, I had the same issue and replacing the resistor pack in the airbox fixed it for me. Best of luck.
85' Sub K-20 4x4 6.5 w/ cooling mods
Phazer and Banks Turbo
33" BFG's w/ Bilsteins Rebuilt 700R4 w/ all the upgrades
Enthusiast
Thanks for your suggestions:Originally Posted by Dvldog8793
It does sound like it is heat related.
I've already replaced the resistor pack and the switch that selects the fan speeds is new. I'll try the relay pack next.
Thanks again.
1991 Suburban 6.2L 3/4T 4X4 Banks Sidewinder Turbo Frybridized
Enthusiast
I've replaced that resistor pack but still have the same problem. Will try the relay pack next.
Thanks.
1991 Suburban 6.2L 3/4T 4X4 Banks Sidewinder Turbo Frybridized
Enthusiast
I would check for faulty connections in the wiring first.
Most of the relays are pretty durable and fixing a connector can be free.
1996 Chvy 3500 CCDWLB 6.5 Heathed, NO vac, marine injctrs, ARB bumper, BIG pipe, 3" lift, bright lights, bypass oil system.
1986 Chvy 6.2 M1009 blazer RAM AIR, Headers, Custom interior
2001 Chinook RV, V10 gas
1974 John Deere 1530 diesel tractor
1993 John Deere 455 Diesel lawn mower
1967 GTO, 1989 Honda Transalp
2009 VW Jetta TDI, flashed and piped, 6speed, fun car!
1998 6.5 suburban, stock, daughter's
1993 6.5 3500 CCSWLB GM8, Heathed, big exhaust, gauges, Son's
1984 6.2 ATS turbo 3500, SCDWLB - Son's
3 kids, 1 wife, 1 dog
Gunsmith, Tactics Instructor, Fabricator USMC 87-93 Semper Fi!
Enthusiast
Good idea!! Thanks.
1991 Suburban 6.2L 3/4T 4X4 Banks Sidewinder Turbo Frybridized
Enthusiast
Sorry for a late reply.
I looked the best I could for faulty wiring and found no bad connections.
Changed the relay and all is fine now.
Thanks for all of your suggestions.
Regards,
Merrill
1991 Suburban 6.2L 3/4T 4X4 Banks Sidewinder Turbo Frybridized
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