« previous next »
Pages: [1]   Go Down

Author Topic: Heater problems  (Read 3480 times)

Offline Neospartan

  • Newbie
  • Posts: 22
  • Newbie
Heater problems
« on: November 05, 2013, 10:03:11 am »
Hello I'm new to the site this is my first post,
I have 73 C10 5.7L, the heater won't switch to HI only low and medium.
Also it won't shut off. Not a/c equipped. Thanks for the help.
Logged

Offline 81_Chevy

  • Frequent Member
  • **
  • Posts: 449
  • A Truck Is Built, Not Bought
Re: Heater problems
« Reply #1 on: November 05, 2013, 10:26:27 am »
Most of the time with the heater not working on HI, or only on HI, its the selector switch that has gone bad. what have you tried so far to fix the problem?
Logged
81 Chevy K20 350 4" Rough Country lift ridin on 35's ; 2 12 inch Subwoofers w/ a custom interior

Eagle Scout - 2012 Proud to be one!

Offline Neospartan

  • Newbie
  • Posts: 22
  • Newbie
Re: Heater problems
« Reply #2 on: November 05, 2013, 11:56:42 am »
I haven't tried anything, I've been trying to do research and kinda coming up empty. I can't find a diagram of any kind on it.
Logged

Offline bd

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 6592
Re: Heater problems
« Reply #3 on: November 05, 2013, 03:53:00 pm »
Hello and welcome to the Forum from Central California!

Quote from: Neospartan on November 05, 2013, 11:56:42 am
...I can't find a diagram of any kind on it.

See the 1973 Wiring Manual in the 1973-87(91) GM Pickup Manuals section of the Forum Technical Pages.

The heater blower is designed to run on "low" speed whenever the ignition is switched on.  Never blowing on "high" speed is likely the blower switch, but could just as easily be poor connections.
Logged
Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)
Pages: [1]   Go Up
« previous next »