Why is the heat not working in my Nissan Altima?
The most common reasons a Nissan Altima heater isn’t working are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor.
What causes heat to stop working?
Dirty and clogged filters are one of the primary causes of furnace problems and can cause high operating costs. The heat exchanger can overheat and shut off quickly when filters are clogged with dust and dirt. This also causes soot buildup on the heat exchanger, which makes your furnace run less efficiently.
Why is my Nissan Altima blowing cold air?
Reasons Your Car Heater Is Blowing Cold Air Heater core issues. Broken heater valve. Busted thermostat. Leaking water.
Why does my air work but not my heat in my car?
If your blower only works on the highest setting, your blower motor control module probably needs to be changed. If the fan isn’t working, you probably need to have the blower motor fixed or changed. If the air coming through isn’t hot, the heater core is probably clogged.
Why is cold air blowing when the heat is on in my car?
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 is my Nissan Altima not heating up?
While not having enough coolant may make your engine run hotter, it can also cause your Altima to not be able to create enough heat. Is there isn’t enough line pressure, due to low coolant, then the heater core will not be able to get any coolant itself.
What does the thermostat do on a Nissan Altima?
The job of your Altima’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. Sometimes when a thermostat goes bad, it stays stuck open.
Why is my car’s heat blowing cold but not hot?
If the heat is blowing, but blowing cold, it has something to do with the coolant getting to the heater core, or the heater core itself. At the simplest level possible, the heater works by passing hot coolant from the engine into a tiny radiator called the heater core.