Q: My engine is over heating and there no heat coming out in the cabin when turning the heat on, I've replaced the water pump and the

asked by on February 07, 2018

A few days going to work one morning and the heater didn't work on the car then later that day coming home from work the car started to over heat I got it cooled down then turned it off and made it Home stopping and cooling it down, I then replaced the thermostat thinking that might be it, same thing happened so I went and got a new water pump installed that and still getting the same results neither the heater is working and the car still over heats. The fans are working as well so I know it isn't that and there's enough coolant on the car as well

My car has 150000 miles.
My car has an automatic transmission.

Trapped air can cause both overheating, and lack of cabin heat, so hopefully after you replaced the thermostat, all air was purged from the cooling system. Assuming the cabin heater control valve is functioning, a common reason for no cabin heat during overheating is the coolant can boil, create trapped air and that trapped air then blocks coolant circulation to and through the heater core. Of course, it is also possible that you coincidentally (coincident to the engine overheating) have a blocked heater core and/or, as noted, a malfunctioning heater control valve. In any event, the most important thing is to fix the overheating problem first as overheating can damage the engine. The most common causes of overheating include low coolant level (including that due to leaks), a faulty thermostat (obviously, you just replaced yours), a plugged radiator, a faulty radiator pressure cap, collapsed hoses, non functioning cooling fans, and a faulty water pump or drive belt. Certain engine faults, such as a leaking head gasket, poor engine running condition or exhaust blockages can also cause overheating. If you desire that this overheating problem be diagnosed by a certified Mechanic, dispatched by YourMechanic right to your location, please request an engine overheating diagnostic and the responding certified mechanic will get this resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Car shakes when I slow down.

Hello. The imbalance of rotating parts on a car, such as your wheel and tire assemblies, is a function of speed but also "positioning". When you were traveling at a steady state rate, say 65 MPH, the suspension was clearly...

Car popped and is now rattling.

The noise you hear may be the flywheel and torque convertor making a rattling knocking noise. The noise may come and go when you put it in and out of gear. If this is the case the manufacturer recommends the...

Car turns on, runs about 30 miles, and then starts shaking and turns off - 2007 Toyota Sienna

Hi there. What will help you the most is determining the nature of the failing behavior when the car shuts off. Does it have spark after it shuts off? After it shuts off (immediately after), if you spritz some starter...

Related articles

2012 Chevrolet Cruze vs. 2012 Hyundai Elantra: Which One Should I Buy?
When you’re looking for a four-door sedan, you’re likely interested in a smaller family car that still offers decent styling and looks, great gas mileage, and a comfortable interior that will keep your family safe as you’re driving. While not...
The 5 Safest Used Cars You Can Buy For Under $20,000
The Subaru Legacy, Honda Accord, Ford Fusion, Chevy Volt, and the Volvo XC60 are five of the overall safest used cars you can buy for under $20,000.
2012 Subaru Outback vs. 2012 Chevrolet Impala: Which One Should I Buy?
When you compare a 4-door sedan versus a 4-door wagon, there are going to be some obvious differences. Even though the Outback looks car-like, the ride, the handling, and the mileage are going to make it more similar to an...