The most common reasons a Jeep Commander heater isn’t working are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor.
Why is my heater blowing cold air in my Jeep?
Low Coolant Level
The coolant (usually a mixture of water and antifreeze) in your engine doesn’t just work to keep the engine from overheating: It’s also the source of heat supporting the heating system. If there isn’t enough coolant in your system, the heater core will blow cold air into your car.
Why does my car have AC but no heat?
Low coolant: Whether caused by a leak or water evaporation, low coolant is the most common source of poor heater output. Thermostat: A stuck-open thermostat prevents the engine (and coolant) from heating up. Heater core: A clogged heater core restricts coolant flow, giving up little or no heat.
How do you troubleshoot a car with no heat?
First, check your coolant level to be sure there is enough liquid in there to even get to your heater core. If your radiator is very low on coolant, you’ll get no heat. If your levels are okay, you either have a bad water pump or a thermostat that isn’t opening.
Where is the heater core in a Jeep Commander?
The heater core looks like a very small radiator, and functions just the same. It’s mounted under the dashboard, and it provides the heat needed for the blower motor to warm the cabin.
Why does my Jeep not have heat?
The most common reasons a Jeep Wrangler heater isn’t working are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor.
Why is cold air coming out of my vents when the heat is on?
Your Air Filter Is Dirty
Clogged air filters could be causing cold air to blow out of your vents. A dirty air filter can block airflow over your furnace’s heat exchanger, which can cause it to overheat.
Why does my heat get cold when I stop?
A low coolant level in the tank represents the main reason why you don’t have hot air in the cabin, it is not just related when the engine is idling, however, this can be the reason why your heater blows cold air at idle. Completing the coolant level with the same type of coolant represents an easy and quick fix.
How can I make my car heater hotter?
And what this is is it's a regular heater hose inside the rubber then you have a layer of insulating material around it now this will keep your heat warmer effects going inside your car.
Is there a fuse for the heater in my car?
Q: Is There a Fuse For The Heater In My Car? A: Your car’s heater does indeed have a fuse. You can check to see if the heater fuse is shot by looking inside your fuse box.
How do I know if my heater fuse is blown?
You may also need to use your multimeter to check if your fuses are blown. You can quickly determine by checking resistance with a multimeter. A good fuse will have nearly zero ohms of resistance, if the fuse is blown there will be no reading.
Can a bad radiator cap cause no heat?
Radiator cap: Your radiator cap regulates the pressure in the cooling system, acting as an escape valve if the pressure gets too high. If it sticks in the open position, there will be insufficient pressure in the system, and the coolant will not get hot enough, reducing the heater’s output.
Why is my car not blowing hot or cold air?
Faulty Heater Core
Faulty heater cores and low or contaminated coolant levels often come hand in hand, and both issues may lead to your engine overheating and your heater not blowing hot air.