Heater problems

Tiny
SMOKE8310
  • MEMBER
  • 1997 GMC C1500
  • V6
  • 2WD
  • 170,000 MILES
My heater stopped blowing heat out but once the truck heats up and I get going down the road doing 50mph pluse it pushes heat threw my vents like I had it set on low you can hear it switch from low to high but nothing comes threw the vents is it my blower motor
Wednesday, February 17th, 2016 AT 6:31 AM

12 Replies

Tiny
JOHNNYT73
  • MECHANIC
  • 924 POSTS
So, your blower motor is not blowing any air through the vents. Does it blow when on high or not at all?
Was this
answer
helpful?
Yes
No
+1
Wednesday, February 17th, 2016 AT 7:18 AM
Tiny
SMOKE8310
  • MEMBER
  • 12 POSTS
Blower does not blow
Was this
answer
helpful?
Yes
No
+1
Wednesday, February 17th, 2016 AT 7:19 AM
Tiny
SMOKE8310
  • MEMBER
  • 12 POSTS
Dont blow on any setting
Was this
answer
helpful?
Yes
No
Wednesday, February 17th, 2016 AT 7:20 AM
Tiny
JOHNNYT73
  • MECHANIC
  • 924 POSTS
Ok, first check your fuses and that you have power on both sides of the fuses.
Was this
answer
helpful?
Yes
No
+1
Wednesday, February 17th, 2016 AT 7:20 AM
Tiny
SMOKE8310
  • MEMBER
  • 12 POSTS
I hear it clicking when I switch my heat from low to high down by the blower already checked the fuses and power
Was this
answer
helpful?
Yes
No
+1
Wednesday, February 17th, 2016 AT 7:22 AM
Tiny
JOHNNYT73
  • MECHANIC
  • 924 POSTS
Ok, then most likely it is the blower motor. I would replace the resistor and blower motor.
Was this
answer
helpful?
Yes
No
+1
Wednesday, February 17th, 2016 AT 7:25 AM
Tiny
SMOKE8310
  • MEMBER
  • 12 POSTS
In the off chance it's not that what else could it be
Was this
answer
helpful?
Yes
No
Wednesday, February 17th, 2016 AT 7:29 AM
Tiny
JOHNNYT73
  • MECHANIC
  • 924 POSTS
The only other thing I can think of would be the HVAC control head
Was this
answer
helpful?
Yes
No
Wednesday, February 17th, 2016 AT 7:30 AM
Tiny
SMOKE8310
  • MEMBER
  • 12 POSTS
Where is that located
Was this
answer
helpful?
Yes
No
Wednesday, February 17th, 2016 AT 7:31 AM
Tiny
JOHNNYT73
  • MECHANIC
  • 924 POSTS
Thats what the unit is called on your dash with your buttons and such on it to control your HVAC
Was this
answer
helpful?
Yes
No
Wednesday, February 17th, 2016 AT 7:32 AM
Tiny
SMOKE8310
  • MEMBER
  • 12 POSTS
Ok it's working so I will change the blower and resister thank you for your time you've been a huge help
Was this
answer
helpful?
Yes
No
Wednesday, February 17th, 2016 AT 7:35 AM
Tiny
JOHNNYT73
  • MECHANIC
  • 924 POSTS
Your very welcome.
Was this
answer
helpful?
Yes
No
Wednesday, February 17th, 2016 AT 8:06 AM

Please login or register to post a reply.

Related Heater Not Working Content

Heater Not Working
VIDEO
Heater Not Working
In­struc­tional re­pair video
Heater Not Working
GUIDE
Heater Not Working
Step 1 - A heater can­not op­er­ate un­less the en­gine is full of coolant/​an­tifreeze. If coolant level is low check the sys­tem for leaks.
VIEW MORE