Skip the auto shop - Our mechanics make house calls

Q: No heat after adding coolant and thermostat almost to H

asked by on

I had heat when I left for work. Coming home I had no heat. Saw coolant was almost empty. Added coolant, car thermostat was almost to H after I added the coolant. What could be the problem?

My car has 93365 miles.
My car has an automatic transmission.

Hello. If the coolant was that low then that will cause the heater to not work. The most important thing at this time would be to determine where the coolant went. For it to be this low that means it is either leaking onto the ground or the engine is burning it. I usually start with a visual inspection to see if I can find the leak. If nothing comes up then I do a pressure test on the cooling system as that is more likely to show the leak. If nothing is still found I do a dye test and then a block test. This will tell me if there is something going on inside of the engine that may be more serious. If you need to have this cooling system problem looked at, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose and repair this cooling system problem.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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

Q: Remove reinstall heater core

Hello there, thank you for asking about your 1990 Geo Storm. Your best option would be to purchase a service manual for your year model. The entire instrument panel must be removed in the process as well as many other...

Q: Car wont turn over.

Be sure the battery is fully charged. "New" batteries are not necessarily fully charged at time of sale. Of course, confirm that the engine immobilizer system (security system) is not activated thus preventing the car from starting. Basically, with the...

Q: Door lock problems.

You will need to have the vehicle checked by a mechanic like one from YourMechanic to see all that got damaged. You may have to have a door lock plate put on to mount the new lock to. If the...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...