Why does my car not blow hot or cold air?
If your car is not blowing warm air into the cabin and the coolant level is fine, then you could have an issue with your heater core. If you suspect that something is amiss with your car’s heater core, watch for these signs: Your car using coolant very quickly. The engine overheating.
Is my car heater blowing out cold air?
Problems with the vehicle’s heating system can be either no air or only cold air coming out of the heating system. A car heating system blowing cold air can be due to a faulty thermostat, low coolant fluid level, malfunctioning heater core, a leaking cooling system, or problems with heating controls and blend door.
How does the heater work on a Toyota 4Runner?
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 4Runner, this process has failed in one way or another.
Why is my radiator not working on my Toyota 4Runner?
Never touch the radiator cap unless the vehicle is ICE COLD. The job of your 4Runner’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.
Where is the hot air valve on a Toyota 4 Runner?
You can get the valve from the auto parts store, and replace it yourself. The other is the heater core is clogged. Its usually located under the dash on the passenger side. It will cost more. Its tougher to replace, and for someone not sure on how to do it, is best to get a mechanic to do.
What happens if a heater core goes bad?
The heater core itself can go bad. Over time, they are known to clog and fail. 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.