Question about 1996 GMC Sierra

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I used to have heat,now i have no heat except when its hot outside.the truck does not run hot.never has in the 5 years ive had it..i dont want waste money on a new heater core or a thermostat, when could be something simple..

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Try adding more coolant in radiator

Posted on Oct 04, 2009

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95 acura legend runs hot but heater wont heat up


bleed the air out of the cooling system. You cannot get all the air out have a radiator shop use a pressure bleeder for the job.

Mar 20, 2014 | 1991 Acura Legend

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

1 Answer

Plymoth breeze vents blow cold air when ive been driving it and its on heat


There is a blend door on the heating box that is called a plenum. That plenum is behind the glove box. There are levers that attach to it on the outside and those control the blend door. Those levers can be run from vacuum or electric or even cables. Check to see if the move when you change the heat setting from hot to cold. But be aware that there is also a mode lever that changes where the air comes out so dont get them confused.

Dec 30, 2013 | 1998 Plymouth Breeze

1 Answer

Hi I have a 2005 mazda 3.. My problem is when I turn the car on my blower comes on but no heat.. As I drive my car after 5 mins my heat comes through the vents.. Any solutions??


The heat that you get from the car's heater is extracted from the engine coolant. When you first start the car, the engine coolant is as cols as the outside air, if not colder. The running engine will heat the coolant after a few minutes and then you will start to feel the heat in the vehicle. The outside temperature and the thermostat in the car are the determining factors on how fast and how hot the coolant will get. On a really cold morning 3-5 minutes is not unreasonable.

Nov 26, 2013 | Cars & Trucks

2 Answers

Instructions on how to use holts wondarwald


Holts Wondarweld
Flush engine.
EXTERNAL CRACKS
1 Run engine until hot,drain off enough coolant to remove thermostat.
2 Remove thermostat.
3 Mix contents of can thoughoughly! and pour contents into thermostat opening.
4 Replace thermostat cover.& fill radiator with hot water,replace radiator cap.
5 Run engine at a fast idle for 15 mins,dont allow to boil.Top up if necessary.
6 Leave Wondarweld in system for 2-3 days then drain off,flush system replace thermostat and refill.
HAIRLINE CRACKS
1 MIX thoroughly and pour into cold engine (radiator if it has a cap)
2 Run engine until hot.
3 Allow engine to cool then run again until hot.
4 Follow procedure 6 above.
INTERNAL CRACKS
1 Follow external crack instructions except after pouring Wondarweld into engine remove spark plug from
affected cylinder and run engine for 20 mins. If more than one cylinder affected run for 5 minute intervals.
2 Allow engine to cool then drain cooling system and refill with clean water.
3 Drain sump & flush,refill with fresh oil.
Note:- 1/2 pint of Wondarweld for every 6 pints of water,DO NOT add antifreeze for at least 3 days after process.

Aug 05, 2012 | Cars & Trucks

1 Answer

93 bonneville heat dont get hot like it should


Make sure the heater core isn't plugged and the water control valve is working correctly.

Nov 06, 2011 | 1993 Pontiac Bonneville

1 Answer

I have a 99 s 10, 4 cylinder 2.2 liter automatic. Im at times having a problem starting it. when its cold outside it fires right away< but after it warms up or if its hot out it wants to crank for 5...


check for leaking O-rings at the injectors, they will allow the engine or some cylinders to flood causing hard starting. After it sits, check for tailpipe smoke, stumbling until you 'clear' it with more petal, or unusually dark or high oil levels. O-rings are a common problem on older cars as they dry out and crack due to years of heat and high pressures.

Apr 11, 2011 | 1999 Chevrolet S-10 Pickup

1 Answer

My 1988 Cabriolet started running hot.


change thermostat if that dont work change heater core if that dont work change your intake manifold gasket

Apr 05, 2009 | 1988 Volkswagen Cabriolet

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