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The Heater only come on in high speed after cghanging the heater the board and the relay this is on a 1500-1

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My 2006 Chevy Silverado 1500 extended cab heater won't shut off when I turn heater off and when truck isn't started and still stays on

Sounds like the HIGH fan relay is stuck in the ON position. Pull the relay and see if it goes off. It should. Then simply replace the relay. This relay should be located under the hood, in the black relay/fuse center.

Mar 29, 2016 | 2006 Chevrolet Silverado 1500

1 Answer

2004 dodge Dakota heater motor won't work on high speed I think high speed relay is bad I can't find it do you know where relay is located

there is no relay for high speed, the blower relay is only for all other speeds except high. The high speed has a direct 12v lead to it (fused). you will need to check for 12v supply at the motor. If no voltage you woll need to check fuse.

Jan 21, 2014 | Cars & Trucks

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How to take out blower motor on 1995 Chevy 1500 silverado 4x4

Sounds like two problems. No high speed could be the blower relay located by the blower motor. The blower motor is located under the dash on the passenger side of truck. You may need to take off the sound kick panel to see the motor. It is connected with 4 screws to the housing. Take out the screws and it should come out.

Jan 19, 2013 | 1995-1997 Chevy 1500 Truck Ignition...

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The 2 low speeds are not working on my pickup i was told it could be a low voltage relay and needing to know where it is located at!! it goes on a 2003 silverado extended cab 1500 5.3litter 4x4

Are you talking about your Heater/AC fan??

If so there is a resistor pack under the dash on the passenger side (mounted to the heater housing). I would check it first.

My 2003 5.3l did the same thing; (not saying that it couldn't be something else). We froze that Summer because the AC only would blow on high.

My silverado had about 80,000 miles when I replaced it, now I have 96,000 and it still works fine.

There is an updated design available that should get your speeds back to normal, and last longer than the original part.

Good luck!

Good Luck!!

May 30, 2010 | 2003 Chevrolet Silverado 1500

1 Answer

Heater wont work on high

it is probably the fan relay which controls all 3 speeds for your heater and cooling a/c fan in the 99 pontiac sunfire it is located on the passenger side firewall under the dash about 1/2 way up it is a white circuit board about2 x3 inches and plugs into a circuit on the firewall about 75.00 to replace if you do it yourself otherwise labor is xtra

Dec 16, 2009 | 1999 GMC Safari

1 Answer

2004 chevy heater fan works on low and medium speed but not on high speed

There are two relays for the heater control fan,a low blower relay and a high blower relay.It sounds like the hi blower relay is bad.

Dec 12, 2009 | 2001 GMC Jimmy

3 Answers

2004 Chevrolet Silverado Heater/AC Blower on without Ignition ON

there is no relay for the heater fan it's a 15 amp fuse and is on the accessories circuit. the reostat is responsible for all 3 speeds .with the key off there should be no voltage to the blower motor whether the fans speed fan switch is on or off. the fuse will be located in the fuse paneleither on the drivers left side in the dash or underneath the dash in the fuse block. you have a short in the harness that is under the dash and most likely it's a bad plug on the harness. your going to have to do some searching but that's where the problem short is... please rate

Oct 03, 2008 | 2004 Chevrolet Silverado 1500 Crew Cab

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