Common questions

What should I do if my Chevy Blazer is not getting heat?

Table of Contents

What should I do if my Chevy Blazer is not getting heat?

If you are not getting heat and the engine IS reaching operating temp then check the heater core by touching both heater hoses; they should both be hot. If one is hot and the other is cooler, then the core is plugged up.

Where is the heater located on a Chevy Blazer?

The cabin heater in your vehicle produces heat from a heater core. The heater core is a small radiator, located under the dashboard of the vehicle and consists of conductive aluminium or brass tubing with cooling fins to increase surface area. Hot coolant passing through the heater core gives off heat before returning to the engine cooling circuit.

Why does my car heater keep blowing hot air?

Hot coolant passing through the heater core gives off heat before returning to the engine cooling circuit. The fan for the vehicle’s ventilation system forces air through the heater core to transfer heat from the coolant to the cabin air, which is directed into the vehicle through the vents.

Why did my 99 Blazer AC stop working?

99 Blazer – AC stopped working in 2007 so took to a shop a few times and was told the compressor was bad because it would not hold freeon. Another told me I had a leak somewhere. However, once freeon is added it is cold but gone the next day.

If you are not getting heat and the engine IS reaching operating temp then check the heater core by touching both heater hoses; they should both be hot. If one is hot and the other is cooler, then the core is plugged up.

The cabin heater in your vehicle produces heat from a heater core. The heater core is a small radiator, located under the dashboard of the vehicle and consists of conductive aluminium or brass tubing with cooling fins to increase surface area. Hot coolant passing through the heater core gives off heat before returning to the engine cooling circuit.

99 Blazer – AC stopped working in 2007 so took to a shop a few times and was told the compressor was bad because it would not hold freeon. Another told me I had a leak somewhere. However, once freeon is added it is cold but gone the next day.

Hot coolant passing through the heater core gives off heat before returning to the engine cooling circuit. The fan for the vehicle’s ventilation system forces air through the heater core to transfer heat from the coolant to the cabin air, which is directed into the vehicle through the vents.

Can a bad heater core cause your car to overheat?

Can a Bad Heater Core Cause Overheating? Leaks are the #1 reason a vehicle begins to overheat. Leaks in hoses, the radiator, water pump, thermostat housing, heater core, head gasket, freeze plugs and a few other things can all lead to problems with the vehicle’s cooling system.

When do you Know Your heater core is bad?

Though, if you’re seeing one of the other signs in addition to a lack of heat that’s a pretty good indicator that the heater core itself has a problem. When a hole or puncture develops in your heater core, all that warm air may escape too quickly to reach you at the other end of the heater ducts.

What are common reasons my Chevrolet Blazer has heater problems?

What are common reasons my Chevrolet Blazer has heater problems? While there are a variety of reasons your Chevrolet Blazer 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.

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…

What happens if the heater control valve fails?

When the heater control valve fails, adjusting the temperature may not change the air temperature at the vents, whether hot or cold. Also, the valve could leak engine coolant, p…

Where is the cabin heater located on a Chevy Blazer?

The cabin heater in your vehicle produces heat from a heater core. The heater core is a small radiator, located under the dashboard of the vehicle and consists of conductive aluminium or brass tubing with cooling fins to increase surface area.

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.

Where is the actuator on a hot air heater?

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. Try placing your hand on it to feel it move or listen closely to hear it move. If it don’t move then that’s your problem.

What causes blower motor to quit working on Blazer?

On my 97 Blazer, the blower motor will suddenly quit working while the anti-lock brake light will simultaniously light and the cruise will switch off. A half hour later, all three will switch back on.

What are the symptoms of a bad heater motor?

One of the first symptoms of a potential problem with the vehicle’s heater blower motor is low airflow from the vents. If when the air or heat is turned on the vents blower noticeably less, or weaker air, that may be a sign that the heater blower motor is starting to wear out.

Why is my heater blower motor not working?

Most blower motors are designed to operate at different speeds in order to be able to regulate different cabin temperatures efficiently. If the blower motor fails to push air at any of it’s designed settings then it may be faulty.

On my 97 Blazer, the blower motor will suddenly quit working while the anti-lock brake light will simultaniously light and the cruise will switch off. A half hour later, all three will switch back on.

Why are the windows on my 97 Blazer not working?

I have a 97 S-10 Blazer with 60k that has an intermittent elcectrical issue with the blower motor and windows not working. The ABS and brake light flash on and off across the dash as if it is doing a systems check while driving the vehicle. At the same time the blower motor stops working and the windows wont work. Now, it wont start at all.

Why is my water heater not working on my Chevy Silverado?

If the neither hose has any heat, you may have air in the cooling system, low fluid, or low pressure. If you look at your temperature gauge, and the engine is running hotter than normal, but there is not heat coming from the heater you may be having issues with the water pump. Try taking the vehicle out of gear and revving the engine a little.

What happens when the blower fails on a Chevy Equinox?

When the blower motor fails, the air conditioner and heater may still work, and heat or cool may be felt at the vents, but the air pressure will be dramatically decreased. This Read More When the heater control valve fails, adjusting the temperature may not change the air temperature at the vents, whether hot or cold.

What happens if you run a Chevy Silverado Hot?

The Chevrolet Silverado is a rugged truck that is made for a tough workload. 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.

What to do if your car heater is blowing out cold air?

Run the engine until the fan kicks in. Once your fan has come on, look around the radiator for a bleed port or bleed screw. This is something that can be turned with a screwdriver. Once you turn it anti-clockwise, you should hear a hiss; this is the air being released. 4. Are the Heater or Heater Controls Broken?

How to troubleshoot an overheating Chevrolet 350 engine?

Twist off the radiator cap after allowing the engine to cool, then look into the radiator to observe the level of antifreeze. Pour antifreeze into the radiator until full if necessary. With the radiator cap off, start the engine and look through the radiator opening while the engine warms.

Why does my Chevy Silverado have no heat?

One heater hose is really hot the other is Luke warm. Probably a plugged heater core Agree. At the shop we use air and water from a rig i made up, works pretty good on a stubborn core, if it comes to that. Possible heater blend door or actuator as well if flush is no help.

What should I do if my Silverado truck is overheating?

Fill the radiator with coolant and allow the truck to run for 20 minutes. This will determine if the coolant level is low, causing the truck to overheat. Use extreme caution when working with the coolant system. The coolant is very hot and builds pressure which could be hazardous.

What is the cooling system on a Chevy 350?

The cooling system for the Chevrolet 350 engine consists of a water pump, a radiator and a thermostat. It is of vital importance that the cooling system work properly, as a cooling problem can lead not only to an engine which overheats, but also to more serious problems such as a damaged head gasket or a cracked cylinder block.

What happens when your Chevy S10 heater stops working?

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 S10, this process has failed in one way or another.

Why is the heater not working on my Buick Enclave?

Not having a functioning heater makes driving much less comfortable, and can be a sign of certain issues. At the simplest level, there are two main reasons why the heater is not working. If it’s not coming on at all, it’s usually either the blower motor or some other wiring issue.

What to do if defrost on GMC Truck is not working?

1. Remove the floor air outlet duct extension (1) from the floor duct (2). 2. Remove the Body Control Module. 5. Disconnect the electrical connection from the mode actuator (10). 6. Remove the mode actuator mounting screws from the HVAC module. 7. Remove the mode actuator as an assembly with the actuator cam. 1.

Why does my Chevy Blazer not 4 wheel drive?

I Have A 2001 Chevy Blazer The 4×4 will not engage. I Press the 4×4 Auto, Hi or Low button on the dash they just keep flashing. you can here the transfer case engage, but It will not be in 4 wheel drive. I have tried driving around with the light flashing to see if it would engage it did not. please help me find out what this is.

Why is the Vauxhall Corsa heater blowing out cold air?

The problem with the heater on the Vauxhall Corsa (as well as the Renault Clio) is often that there is no power from the heaters at all. This issue has nothing to do with cold air coming out instead of heat. This loss of power is also a common issue on the Renault Clio. Or you may have a dirty fan that is stuck.

What are the symptoms of a bad coolant temperature sensor?

Hence, it is advised to have your car inspected right away to avoid any serious problems. Here is a more detailed list of the common symptoms of a bad coolant temperature sensor. One of the first symptoms you will notice is that the check engine light will activate.

What should the coolant temp be on my Chevy?

I though the thermostat might be broken, so I replaced it with a 180 (was a 195). Problem continues except now it goes from 180 swings up to 210, then back below 180, then to 180 and repeates this all the time regardless of how long I drive. Anyone have any other ideas?

Why does my heater not change the temp?

The temp control switch is only switching temps half the time. Sometimes it will work sometimes it wont. I can turn it back and forth from hot to cold and it will not change the temp coming out of the vents. Its random, sometimes just playing with it for awhile will get it to work. Any idea what it could be? Hoping its just the switch.

Is there a problem with my AC heater?

Im Having problems with my trucks heater/ac. The temp control switch is only switching temps half the time. Sometimes it will work sometimes it wont. I can turn it back and forth from hot to cold and it will not change the temp coming out of the vents. Its random, sometimes just playing with it for awhile will get it to work.

What to do if your car heater is not working?

Open glove compartment, and lift tab in upper left corner to allow the glovebox to swing down completely towards the passenger floorboard. 3. Gently remove the line that enters the “Vac Unit”, and then the “Vac Unit” itself by wiggling it upwards off its mount. Once removed gently swing it towards the drivers side and out of your way.

Why do I get no heat from my air conditioner?

I get no heat all, i am assuming the switch works since if i have it on AC and use the temperature control the fan slows down when it hits 72 or whatever i have it set to, flipping it to heat the air temp is the same. Heading to advance auto shortly hopefully they have it in stock

Why does my Blazer blow air to the floor?

My 1999 S10 Blazer LT 4.3L 2WD with computerized climate control will not switch air flow to the floor. I have defrost and top-vent all of the time no matter what position the switch is in, but not to the Floor.

Author Image
Ruth Doyle