Best Answer

I have the identical problem on a 1991 Jimmy. I have replaced the blower motor and flushed the heater coil. I know the vents are working properly because they work when the temperature is selected to cold. I am wondering if there is something under the hood that redirects the aif flow either through the cooling coil or the heater coil based on the position of the temperature control. If so possibly the heater coil (air side) is clogged. I noticed that the heater coil is below the AC coil so it is possible that debris is down in it. I may try to pull it and clean it. Have you tried that?

User Avatar

Wiki User

2008-01-07 13:23:13
This answer is:
User Avatar
Study guides

Add your answer:

Earn +20 pts
Q: What is the cause of 1995 jimmy with no heat coming from main vent Defrost is fine as well as floor heat When turned to cold side air flow increases When turned back to heat air flow subside?
Write your answer...
Still have questions?
magnify glass
Related questions

2008chevyimpala ac still clicks after it gets turned off?

Did you happen to move it to Defrost when you turned it off? The ac compressor also runs in the defrost cycle to keep the seals lubricated during the winter months when the ac is not used.

96 Saturn belt slip when defrost turned on?

when the defroster is turned on, it activates the a/c compressor. the clutch may be locking up on the compressor.

What increases value when turned upside down?

the number 6

What would cause engine to make noise when defrost is turned on?

The A/C system compressor operates when in the defrost mode. If the noise is also heard when running the A?C it is more than likely a problem with the compressor/pulley.

You have and antifreeze smell in your 2003 Nissan when the heat or defrost is turned on what should you do?

you probably have a leaking heater can replace it or bypass it

What number when turned upside down increases by 21?

Sixty eight.

What numbers value increases by one half when turned upside down?


2000 Chevy 1500 heater not working but the AC works fine. It seems as long as you leave the blower control turned below 2 you can get somewhat warm air coming out of the vents but not on defrost?

i just replaced the thermostat in 2004 Chevy truck heater works fine now

Does water expand when turned to ice?

Yes. This increases its volume, which results in a decrease in its density.

Why is Vagina juice coming out without getting turned on?

Answer Maybe you aren't turned on sexually, but who knows what thoughts are going on in your head.

Check engine light comes on when key turned on but not coming on once engine is turned on why?

It is not supposed to be on when engine is running unless there is a problem.

Why does the AC sysmbol light come on when the heat is turned on and set to defrost-vent and will not turn off even when shut off button is hit?

DO NOT FEAR THIS !!! The ac comes on with the defrost: because do you ever use your ac in the winter? me neither. Manufactures have made the ac come on with the defrost to prevent the ac compressor from seizing up. Since we never use them in winter, at least in cold climates. Cheers and drive on.

People also asked