Why does my car overheat when the heater is on?
Your engine’s cooling system builds up an enormous amount of pressure. The net result is a searing hot jet of air flowing from the heater vents, and engine overheating as a result of little to no coolant flowing through the radiator.
What to do if your car is overheating but no heat?
Now, if the upper radiator hose is hot but the lower hose and the heater hoses are cold then try a new thermostat and see if the issue is repaired or not. The thermostat should open and close as the engine temp moves up. If the thermostat is “stuck” it can close off all coolant to the engine…thus overheating and no heater heat will result.
What happens if there is no hot air coming from the heater?
If there is no hot air coming from the heater it is usually do to no hot coolant circulating in the engine. So if you have no hot heater air AND you have an overheating engine…this could mean you have no coolant in the engine, or not enough coolant.
How can I tell if my car heater is hot?
Follow the upper radiator hose to where it connects to the engine. The thermostat housing is what the hose attaches to. Is the upper hose hot now that the engine is at normal temp, it should be. If the upper hose is hot, then feel the lower radiator hose, it should be about the same temp.
How does the heater work on an Acura MDX?
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.
What to do if your Acura 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 MDX, this process has failed in one way or another. A word of caution: If there is no coolant in your overflow, you can refill it by adding more to the overflow reservoir.
Why does my MDX not have enough coolant?
While not having enough coolant may make your engine run hotter, it can also cause your MDX 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.
Why is the heater not working on my Ford Escape?
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.