Question about 1999 Chevrolet Blazer

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1998 Blazer, no heat to floor

When set to floor heat, heat only goes to windshield. All other settings work well and it puts out plenty of heat, just unable to get heat directed to floor.

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  • DanColin Nov 22, 2008

    no heat on the floor

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Mine did the same thing. Has there been an accident where there may be glass that fell behind holding the shield door shut? If not it's the shield itself that is under the dash and you have to tear the dash apart to get to it. The shield is stuck shut on you and that is why there is no floor heat.

Posted on Nov 23, 2008

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1 Answer

How to stop my mirror from shaking in my car?


I am working on the same problem. Hardware store guy said to get some rearview mirror adhesive and put a few drops all around where it goes onto the windshield mount and hold it steady until it sets up. Have not tried that yet.

Jun 20, 2014 | 1999 Chevrolet Blazer

Tip

Tips for operating Air conditioning system on Toyota Hilux and someother...


To cool off your Toyota after it has been parked in the hot sun, drive with the windows open for a few minutes. This vents the hot air, allowing the air conditioning to cool the interior more quickly.

Make sure the air intake grilles in front of the windshield are not blocked (by leaves or snow, for example).

On humid, do not blow cold air on the windshield. The windshield could fog up because of the difference in air temperature on the inside and outside of the windshield.

Keep the area under the front seats clear to allow air to circulate throughout the vehicle.

On cold days, set the fan speed to high for a minute to help clear the intake ducts of snow or moisture. This can reduce the amount of fogging on the windows.

When driving on dusty roads, close all windows. If dust thrown up b the vehicle is still drawn into the vehicle after closing the windows, it is recommended that the in intake be set to FRESH and the fan speed to any setting except "OFF".

If following another vehicle on a dusty road, or driving in windy and dusty conditions, it is recommended that the air intake be temporarily set to RECIRCULATE, which will close off the outside passage and prevent outside air and dust from entering the vehicle interior.

HEATING

For best results, set controls to;
Fan speed ---- Any setting except "OFF"
Temperature----Towards WARM (red zone)
Air intake ---- FRESH (outside air)
Air flow ---- FLOOR
Air conditioning ---- OFF

For quick heating, select recirculated air for a few minutes. To keep the windows from fogging, select fresh after the vehicle has been warmed.

Press the "A/C" button on for dehumidified heating.

Choose floor/windshield air flow to heat the voltage interior while defrosting or defogging the windshield.

AIR CONDITIONING

For best results, set controls to;

Fan speed --- Any setting except 'OFF"
Temperature --- Towards COLD (blue zone)
Air intake --- (outside air)
Air flow --- PANEL
Air conditioning --- ON

For quick cooling, move the air intake selector to recirculate for a few minutes.

VENTILATION

For best results, set controls to;

Fan speed --- Any setting except 'OFF"
Temperature --- Towards COLD (blue zone)
Air intake --- (outside air)
Air flow --- PANEL
Air conditioning --- ON

DEFOGGING

The inside of the windshield

For best results, set controls to:

Fan speed --- Any setting except 'OFF"
Temperature --- Towards WARM (red zone) to heat; COLD (blue zone) to cool
Air intake --- FRESH (outside air)
Air flow --- WINDSHIELD
Air conditioning --- ON

The outside of the windshield

For best results, set controls to:

Fan speed --- Any setting except 'OFF"
Temperature --- Towards WARM (red zone)
Air intake --- FRESH (outside air)
Air flow --- WINDSHIELD
Air conditioning --- OFF

On humid days, do not blow cold air on the windshield. The windshield could fog up because of the difference in air temperature on the inside and outside of the windshield.

DEFROSTING

The outside of the windshield

For best results, set controls to:

Fan speed --- Any setting except 'OFF"
Temperature --- Towards WARM (red zone)
Air intake --- FRESH (outside air)
Air flow --- WINDSHIELD
Air conditioning --- OFF

To heat the vehicle interior while defrosting the windshield, choose floor/windshield air flow.

on Feb 14, 2011 | Toyota Pickup Cars & Trucks

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Sep 15, 2009 | 1998 Chevrolet Blazer

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Air only blows out on windshield & floor when


THERE IS A VACUUM LINE THAT GOES FROM THE LEFT FRONT OF THE ENGINE TO THE VACUUM CHECK VALVE NEAR THE ACCUMULATOR. IF THAT LINE IS BROKEN THE PROBLEM YOU HAVE IS NO HVAC MODE SWITCHING.

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No floor heat


Many vehicles have a vacuum actuated valve (or flap) internal to the console vent plumbing. The vaccum line going to this valve/vac solenoid may be bad, unhooked or not functioning. In GM products, IIRC, the vac lines inside the vehicle are made of hard plastic, off-white in color (some have a slight green tinge) and are not easily flexible.

Check down under the dash where the floor output is and see if you see some of the plumbing of which I write. Then check to see if there are any loose lines, etc.

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Windshield wipers


Mine did the same thing on my S10 pick up.
I took the motor off, drilled out all the rivets, cleaned it made sure the brushes and commutator were OK, greased the drive and put it all back and no improvement. I bought a replacement motor from here: rockauto and they have been fine ever since.

Aug 14, 2008 | 1998 Chevrolet Blazer

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