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heating

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How To Keep Your Car From Overheating
Monitoring your coolant level, turning the A/C off in very hot weather, and regular inspections will help you avoid having an overheating car.
How to Diagnose a Broken Car Heater
A working car heater will keep you warm and defrost your car. A failing radiator, thermostat, or heater core can cause your heating system to fail.
How Long Does a Heater Blower Motor Resistor Last?
Keeping the cabin of your car warm during the frigid temperatures of winter can be a lot easier said than done. If even one of the components of the heater are...
How Long Does a Heater Bypass Tube Last?
In order for the cooling system on your vehicle to work, you will have to make sure that all of its components are repair free. The thermostat that is on your...
Symptoms of a Bad or Failing Heater Control Valve
Common signs include the heater not working, coolant leaking from under the engine, and no voltage across the heater control valve.
Symptoms of a Bad or Failing Heater Bypass Tube
If you see coolant leaking under your car or smell coolant from your car, you may need to replace the heater bypass tube.
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Symptoms of a Bad or Failing Heater Blower Motor Resistor
Common signs include the car's heater not working or getting stuck on a certain speed, or something getting jammed in the blower motor.
How Long Does a Heater Hose Last?
The engine of your car produces a lot of heat. Making sure that the heat that the engine produces does not affect its overall level of functionality is the job of the...
Symptoms of a Bad or Failing Heater Blower Motor
If your car's heater doesn't work, only works on certain speeds, or only cold air comes out, you may need to replace the heater blower motor.
How Long Does a Connector Hose Heater Control Valve Last?
The hose heater control valve opens and allows hot coolant from the engine to blow into the heater core. After the vehicle gets to the correct temperature, the thermostat...
How to Buy a Good Quality Heater Blower Motor Resistor
Vehicles that are equipped with a manual HVAC, or climate control, system utilize a blower motor resistor to control the speed of the heater blower. If you are driving a minivan or...
How to Buy a Good Quality Heater Control Valve
When your heater does not heat, it is a pretty obvious problem. What is not obvious is exactly where the problem lies. Chances are, the problem might be with a little part...
Symptoms of a Bad or Failing Connector Hose Heater Control Valve
If your car's AC stops being able to blow warm air and you find coolant leaks, you may need to replace the connector hose heater control valve.
How to Buy a Good Quality Heater Blower Motor
The heater blower motor is part of the air conditioner and heater controls assembly, one of the many features created to make your ride as comfortable as possible. Your heater and air...
Symptoms of Bad or Failing Heater Hoses
Common signs include coolant leaking, hoses cracking, and engine overheating.
How Long Does a Heater Blower Motor Last?
During the colder parts of the month, you will start to rely more and more on your car’s heater. With all of the different components that are in place to ensure...
How Long Does a Heat Shield Last?
The heat that is produced by the exhaust system of an engine is much higher than most people realize. With all of the vital and sensitive components that are on your engine,...
How to Flush Out Your Heater Core
If your car’s heater doesn’t seem to be working too well, it might be time to flush it out. Flushing out the tubes in the heater core will allow the coolant to...
Signs You Need a New Car Heater
Car heaters are a key car part for those living in cooler climates. A common sign your car heater isn't working is when air doesn't heat up quickly.

Related questions

Question
thermostat?
It is not uncommon for the temperature gauge to drop when the heater is switched on, especially in colder situations (below 40 degrees f). The thermostat should be able to control the engine temperature in a way that you should...
Question
Heater does not blow air.
This may be related to a faulty blower motor or blower motor relay. Occasionally, the blower motor itself will wear out or become faulty working intermittently as the brush contacts inside the motor wear out. The blower motor relay supplies...
Question
I have an exhaust smell in my car and I need to figure out why and where it is coming from?
Hi there. First check the blend doors to the heater / air conditioning system. If you are smelling ambient air smells in the cab, then the blend doors may be opening to the outside air. For the exhaust leak, check...
Question
Would you put new engine & other possible new parts? OR get a new used car?
If the rest of the vehicle is clean and in good condition then you may want to spend the money and have the vehicle repaired. 100K miles isn't the worst for mileage and after these repairs, you've fixed the couple...
Question
No heat when ideling or driving slow.
The lack of heat being generated by your system may indicate a clogged heater core. The [heater core]((https://www.yourmechanic.com/services/heater-is-not-working-inspection) is a small radiator like unit that circulates the hot coolant from the engine through the heater core which then uses this...
Question
If I accelerate my heat blows hot....idle speed blows cool and overheats if at an idle
The heater not working in some cases may be related to the overheating problem you are also having. This may be due to a faulty heater blower motor or potentially a bad heater core. As you may know, the heater...
Question
Water leak under passenger side?
The water on the floor in the passenger side of the car suggests that you may have a leaking heater core. The [heater core]((https://www.yourmechanic.com/services/heater-is-not-working-inspection) is a small radiator like unit that circulates the hot coolant from the engine through the...
Question
heat stopped working, only blowing cold air. checked and replaced fuses but no change
Two common causes of no heat, as you describe the circumstances, are a fault with the heater control valve and/or a problem with the blend door in the under dash ventilation system being stuck in position or inoperable. There are...
Question
Does this vehicle use vacuum for controls inside the dash from the motor ? 2001 Toyota Tacoma
Hi there - your HVAC blend doors will be either cable-control or electrical - no vacuum operation. It is certainly possible to still have an air leak in the intake. If you hear an air hiss under the hood, there...
Question
Coolant leak and heater is not functioning
Hello. If your engine is leaking coolant then it is likely causing, at least partially, your heater malfunctions. The heater uses engine coolant to generate heat and if the engine is leaking or runs low the coolant may not reach...
Question
Heating
This may be the result of a leaking heater core. The [heater core]((https://www.yourmechanic.com/services/heater-is-not-working-inspection) is a small radiator like unit that circulates the hot coolant from the engine through the heater core which then uses this warm coolant to heat the...
Question
Over heating
This can be caused by a number of things such as low coolant levels, a faulty thermostat, a clogged radiator or a failing coolant fan switch. As you may know the coolant fan switch helps to maintain the proper coolant...
Question
Why does my car blow heat then stop and then start up again??
This may be a sign of a faulty blower motor. As you know, these have electric motors in them that wear out over time and will begin to make squeaking or grinding noises as the bearings begin to wear out....
Question
2004 mercury mountaineer a/c works. No heat fan switch only works on 4 car not overheating Smell antifreeze inside car but no leak
The blower resistor in the blower housing for the a/c blower most likely has gone bad and open circuit in resistor. Replace the blower resistor. The smell of coolant in the dash vents may be from a leak in the...
Question
No heat when not pushing on gas
You may have a clogged heater core that may be prohibiting the outer linings of the heater core to get hot. As you know, the heater core is a series of tubes that the coolant runs through that generates the...
Question
The heat in my car won't work
This may be a sign of a faulty blower motor. As you know, these have electric motors in them that wear out over time and will begin to make squeaking or grinding noises as the bearings begin to wear out....
Question
I have a smell coming from under the hood when I turn the heater on.
Hi there. The smell would be the cabin air filter causing the odor to fumigate the area. Find the cabin air filter and replace the filter with a new one. Usually the filter is found in a trap door behind...
Question
My car is overheating and my heater is blowing cold air on and off
The heater not working in some cases may be related to the overheating problem you are also having. This may be due to a faulty heater blower motor or potentially a bad heater core. As you may know, the heater...
Question
Heater only works sometimes
The lack of heat being generated by your system may indicate a clogged heater core. The [heater core]((https://www.yourmechanic.com/services/heater-is-not-working-inspection) is a small radiator like unit that circulates the hot coolant from the engine through the heater core which then uses this...
Question
Heater and oil light issues.
Hello. From what you describe it would appear that your vehicle is experiencing two separate issues. Problems with the heater can be caused by a few different things. The first thing I would check is to make sure that the...

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