How does the heater on a GMC Yukon work?
At the simplest level possible, the heater works by passing hot coolant from the engine into a tiny radiator called the heater core. At this point, the blower motor blows air across the it and the newly heated air blows on to the driver and passengers. If the heater has stopped working in your Yukon, this process has failed in one way or another.
Why does my Chevy Camaro heater not work?
They both should feel warm or hot to the touch with the engine on. If one of the hoses is hot, and the other one is cold, that is a pretty good indication that the heater core is clogged. If the neither hose has any heat, you may have air in the cooling system, low fluid, or low pressure.
What to do if your Tahoe has no heat?
2003 Tahoe No Rear Heat Fix, Suburban, Yukon XL Repair! – YouTube If playback doesn’t begin shortly, try restarting your device. Videos you watch may be added to the TV’s watch history and influence TV recommendations.
Why is my heater not working on my Buick Encore?
If you have a heater core that clogged, it’s not going to be able to pass coolant through. Without the warm coolant going through it, there can be no heat. A bad heater core can also leak, so watch out for that. Feel your passenger floorboard to see if it’s wet.
At the simplest level possible, the heater works by passing hot coolant from the engine into a tiny radiator called the heater core. At this point, the blower motor blows air across the it and the newly heated air blows on to the driver and passengers. If the heater has stopped working in your Yukon, this process has failed in one way or another.
What to do if your Ford Fusion heater is not working?
When the blower motor resistor fails, the air conditioner and heater may still work, but air may blow from the vents at only some of the fan speed settings. If the resistor isn…
They both should feel warm or hot to the touch with the engine on. If one of the hoses is hot, and the other one is cold, that is a pretty good indication that the heater core is clogged. If the neither hose has any heat, you may have air in the cooling system, low fluid, or low pressure.
If you have a heater core that clogged, it’s not going to be able to pass coolant through. Without the warm coolant going through it, there can be no heat. A bad heater core can also leak, so watch out for that. Feel your passenger floorboard to see if it’s wet.
Why is my AC heater fan not working?
This sounds more like a problem with high speed fan relay. On the low speeds, the fan relay routes the voltage thru the resistor block. When you switch to high fan speed, the relay switches over to supply full voltage from the battery to the fan motor.
Why does my Astro AC fan not work?
My 91 Chevy Astro doesn’t like to blow air on high. The AC/Heater fan works fine at lower settings but when in high it doesn’t work at all or will run for 30 seconds and then stop. I’ve replaced the switch in the dash, but that didn’t help.
Why is my Chevy Suburban heater not working?
Is there isn’t enough line pressure, due to low coolant, then the heater core will not be able to get any coolant itself. You can verify this by checking the coolant level by taking a peek at the overflow reservoir. The overflow reservoir will be connected to the radiator by a tube coming from the top (usually right by the radiator cap).
What kind of problem does my GMC Yukon have?
I’ve got a 1997 GMC Yukon (bought in 2001). Anyways, it’s always had this problem: the fan starts blowing, I can feel the faintest leak of hot or cold air out of the vents, but no air comes out of the vents. This is an intermittent problem.
Why is my Yukon XL not getting cold?
The A/C in my 2004 Yukon XL wasn’t getting cold any more. I figured it was a basic freon leak. Dealer said the control module needed to be re-programmed. Charged me 2.5 hours labor at 95 $/hr. They could not explain what went wrong or why it needed to be reprogrammed, they just said that is what needed to be done. Did I get duped? Ouch.
What causes a heater to blow cold air?
The following are some issues that may be causing the heater to blow cold air: Low coolant levels. A plugged/clogged heater core. A faulty thermostat (thermostat that is stuck) Broken blower and/or blower motor. Heater core bypass hoses that have leaks.
Why does my transmission heat up in hot weather?
Hot weather contributes to an overheating transmission by raising the resting fluid temperature, so it’s warmer than normal from the get-go. Combined with city driving, your transmission fluid is bound to heat up and wear out sooner, so it pays to check it frequently.
Can a defective solenoid cause a transmission to overheat?
A defective solenoid has to be replaced. A thorough diagnosis of your transmission overheating issues should be able to identify the solenoid as the problem, but sometimes the underlying circuitry can be the issue. Either way, the solenoid should be checked if all other issues have been addressed and your transmission still overheats.
Why does my check engine light keep overheating?
If air can’t flow through the vanes of the cooler, it can’t exchange the heat from the fluid to the air. Just something to be aware of. These pieces all clog for different reasons, but that is an article for a different day!
What are common reasons my GMC Yukon overheats?
What are common reasons my GMC Yukon overheats? While there are a variety of reasons your GMC Yukon is overheating, the most common 3 are a coolant leak (water pump, radiator, hose etc.), the radiator fan, or a failed thermostat. See what others are asking about their GMC Yukon.
What can cause a car transmission to overheat?
Driving habits, conditions, and weather are other possible causes of transmission overheating. If your transmission is running hot, be aware of possible causes. Most transmission problems are a result of overheating. Reasons for overheating include low fluid levels, leaks, burned, old or dirty fluid, or problems with the solenoid.
How can I tell if my Silverado is overheating?
Locate the radiator in front of the engine compartment. Twist the radiator cap counterclockwise to remove it from the radiator. Once the cap is off, check the coolant level. The coolant should be visible by looking down in the radiator. If you do not see any coolant, then you will want to test for leaks.
What happens if you run your truck too hot?
Coolant system failure can eventually cause major engine damage as running the truck hot can lead to head gasket failure or loss of power eventually causing the motor to stop running. Troubleshooting your coolant system, when the problems are minor, will save you time and money in the long run. Allow the truck 30 minutes to cool down.
Is there isn’t enough line pressure, due to low coolant, then the heater core will not be able to get any coolant itself. You can verify this by checking the coolant level by taking a peek at the overflow reservoir. The overflow reservoir will be connected to the radiator by a tube coming from the top (usually right by the radiator cap).
Where is the cold air heater on a GMC Yukon?
It was cold out and the heat would not work in the front only. Turned out that the blend door motor was dead. It is under the glove box at the passengers feet. A small servo motor that turns hot and cold air valve in the heater box.
Why does my GMC Yukon blow hot and cold air?
A small servo motor that turns hot and cold air valve in the heater box. I pulled the small flat motor off and noticed the shaft was jammed and would not turn when i moved the temperature selector knob from hot to cold. I reached in and turned the air valve with my finger and verified that it was not stuck.
Why does my Yukon Denali have no air?
Here’s how I resolved the no rear air problem in my 2006 GMC Yukon Denali. Rear air controls just show “OFF” when you try to power them on. I’ll answer them one at a time. This is actually working as designed. The rear air controls are only active when the front fan selector is set to “AUX”.
What does the thermostat on a GMC Yukon do?
Never touch the radiator cap unless the vehicle is ICE COLD. The job of your Yukon’s thermostat is to regulate the temperature of the engine. It does this by allowing water to enter the engine when it is getting hot, and by keeping coolant from entering while the vehicle warms up.
The A/C in my 2004 Yukon XL wasn’t getting cold any more. I figured it was a basic freon leak. Dealer said the control module needed to be re-programmed. Charged me 2.5 hours labor at 95 $/hr. They could not explain what went wrong or why it needed to be reprogrammed, they just said that is what needed to be done. Did I get duped? Ouch.
I’ve got a 1997 GMC Yukon (bought in 2001). Anyways, it’s always had this problem: the fan starts blowing, I can feel the faintest leak of hot or cold air out of the vents, but no air comes out of the vents. This is an intermittent problem.
Why is my car heater not getting coolant?
A car that is not getting coolant will heat up and damage itself permanently. If it leaks water, you need to find the source. It can be a split hose, leaky radiator, the water pump, or even worse, the head gasket.
What does it mean when coolant doesn’t reach operating temperature?
To verify the actual engine temperature, check if the top hose to the radiator is hot after a drive. Thermostats normally open at around 80-90°C and the hose will only get hot once the thermostat has opened. The fact that the coolant temp is lower than the thermostat set point indicates that the thermostat isn’t doing what it’s supposed to do.
Why is my GMC Yukon XL heater not working?
While there are a variety of reasons your GMC Yukon XL 1500 heater is not working, the most common 3 are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor. See what others are asking about their GMC Yukon XL 1500.
Can a Yukon blow cold in front and hot in back?
Yes ur yukon can blow cold in front while back blows hot. Look for your actuator it’s usually behind the glove box just to the left or on the upper right side of the box. Turn your temp back and forth. Your checking to see if your actuator moves.
Why is my Chevy Blazer not blowing hot air?
If there is a lack of hot coolant running through the heater core or less common, a pocket of air trapped in your heater core, the vents will not produce hot air. It is crucial that you immediately check the level of the antifreeze in your radiator and fill it until it is full.