Fan problem - - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dan42 · 01-18-2009, 08:14 PM

I finally got my heater fixed up in my '67! I replaced the fuse box, switch for the fan, fan, heater core, and just about everything else. The fan was working great! I hooked up the hoses so I would actually have heat, and turned on the fan, and it blew out hot air - for about 10 seconds - and quit. I do have original wiring for the heater installed. Does anyone have any ideas???

Sammy · 01-18-2009, 08:24 PM

First thing to check would be fuse for the fan if it's not running. If OK remove the fan motor then run a temp wires straight off the battery posts see if its running to rule out wiring.

Andy4639 · 01-18-2009, 08:26 PM

Did the fan quit or did it stop blowing hot air? If it's the hot air quit, but still blowing check the water level and make sure the water pump and hoses are correct. Make sure the door is open for the heat to come through also.

eightbanger · 01-18-2009, 08:37 PM

Maybe have a look at the blower relay and check the speed resistor found in the heater box in the pass side footwell.

dan42 · 01-18-2009, 10:37 PM

The fan just quit, right after I turned on the heat. It actually blew out hot air for a few seconds, then quit. I haven't pulled the fuse yet, it was too dark, but what would cause the fuse to pop? Could I have installed the fan incorrectly? It looked pretty straightforward to me.

67ChevyRedneck · 01-19-2009, 02:07 AM

Did you remember to reinstall the ground wire on the fan?

Also, pull all of the wiring plugs and make sure the connections aren't corroded. You might get lucky and find a bad connection by turning the fan on and jiggling the connections individually, just don't get shocked

01-18-2009, 08:14 PM	#1
dan42 Registered User Join Date: Feb 2007 Location: Cali Central Coast Posts: 5,191	Fan problem - I finally got my heater fixed up in my '67! I replaced the fuse box, switch for the fan, fan, heater core, and just about everything else. The fan was working great! I hooked up the hoses so I would actually have heat, and turned on the fan, and it blew out hot air - for about 10 seconds - and quit. I do have original wiring for the heater installed. Does anyone have any ideas??? __________________ '67 SWB Fleetside ZZ4/350/Tremec 5-speed/4link/Scott's IFS - and fun as heck! SOLD Click here to support the board Philippians 4: 6-7

01-18-2009, 08:24 PM	#2
Sammy Registered User Join Date: Apr 2000 Location: Bonne Terre, Mo Posts: 3,005	Re: Fan problem - First thing to check would be fuse for the fan if it's not running. If OK remove the fan motor then run a temp wires straight off the battery posts see if its running to rule out wiring. __________________ '69 Chevy Long Fleet & '71 GMC Short Step & Project "ODD BALL" "You can wash a pig, soak it in most expensive perfume. In the end it is still just a pig." ODD BALL build thread http://67-72chevytrucks.com/vboard/s...d.php?t=478629"

01-18-2009, 08:26 PM	#3
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,936	Re: Fan problem - Did the fan quit or did it stop blowing hot air? If it's the hot air quit, but still blowing check the water level and make sure the water pump and hoses are correct. Make sure the door is open for the heat to come through also. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

01-18-2009, 08:37 PM	#4
eightbanger 454 MAKES IT ROAR Join Date: Jan 2008 Location: Essex, U.K Posts: 2,701	Re: Fan problem - Maybe have a look at the blower relay and check the speed resistor found in the heater box in the pass side footwell. __________________ Nigel. An American living in a British body. 1971 Chevy Cheyenne 10 454 "In a time of universal deceit, telling the truth becomes a revolutionary act." - George Orwell "When injustice becomes law, resistance becomes duty" - Thomas Jefferson No more pain. 03.12.60 -- 12.28.10 http://www.youtube.com/Eightbanger

01-18-2009, 10:37 PM	#5
dan42 Registered User Join Date: Feb 2007 Location: Cali Central Coast Posts: 5,191	Re: Fan problem - The fan just quit, right after I turned on the heat. It actually blew out hot air for a few seconds, then quit. I haven't pulled the fuse yet, it was too dark, but what would cause the fuse to pop? Could I have installed the fan incorrectly? It looked pretty straightforward to me. __________________ '67 SWB Fleetside ZZ4/350/Tremec 5-speed/4link/Scott's IFS - and fun as heck! SOLD Click here to support the board Philippians 4: 6-7

01-19-2009, 02:07 AM	#6
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	Re: Fan problem - Did you remember to reinstall the ground wire on the fan? Also, pull all of the wiring plugs and make sure the connections aren't corroded. You might get lucky and find a bad connection by turning the fan on and jiggling the connections individually, just don't get shocked __________________ Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride American Born, Country by the Grace of God 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications! Last edited by 67ChevyRedneck; 01-19-2009 at 02:07 AM.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.