Front heater blows cold air

[dcjohns]

I have a '99 Expy and just recently the heater only blows cold air. I am not as technical as some of the posts I have read. Not wanting to waste time, money & energy on the standard mechanic, of which most I do not trust. Where do I begin to resolve this issue.

Separate issue is that the speedometer LCD works intermittently. All other lights and gauges work fine.

 

[HFFH]

the lcd is a comon prob.mine does it as well. based on wut if read its a loose conection where its sodered to the circut board. if i smack the dash mines comes right back on on. as far as the heater,,,, does the rear blow cold as well?

 

[tonydiv]

I noticed that my heater knob "slipped" from turning it too quickly when it was cold outside. I had to warm up the truck and then turn the knob back until it "caught" and then slowly move it to the red.

Give it a shot.

 

[panda24619]

if its the knob pull it off take some electrical tape, a small, if not tiny piece and wrap the little metal piece with it and then put the knob back on. it should stay better that way.

 

[tonydiv]

On mine it wasn't really the knob tha slipped off the shaft, it was more like a slip somewhere in the 'linkage' for lack of a better term.