Skip the auto shop - Our mechanics make house calls

Q: Slight overheat low coolant

asked by on

Heater blows cold air. Low on coolant 3 months ago.filled it fixed heat issue. Oil change at that time. No coolant in oil. Does not blow white smoke or drip out of exhaust. Low on coolant again at this time, now overheats a little bit but not all the time. No visible leaks. Cooling system was pressure tested last time it was low by dealership. No pressure leak. Another Nissan mechanic said it has open system and is normal.

A: This could be caused by a variety of things...

This could be caused by a variety of things such as low coolant levels, a clogged heater core, a faulty thermostat, a faulty blower motor or heater core bypass hoses that are leaking. I would also recommend checking the water pump to be sure it is operating as it should. I would suggest having an expert from YourMechanic come to your home to diagnose and repair.

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

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: Evap large leak code

If you have a large emission system leak the best way to find the leak is to do a smoke test and put smoke pressure in the fuel tank and it will show the smoke out of the system leak....

Q: Reduced engine power warning on, disabled throttle

There is a common issue among vehicles of this year model with the throttle position sensors on the throttle bodies. The reduced engine power warning may have also illuminated the Check Engine Light and stored a faults code. I suggest...

Q: Front brakes quit working

If you have brake fluid that is creamy looking then it is contaminated from the wrong fluid or water in the fluid. You may need to replace the master cylinder and reservoir along with any component that has any rubber...

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...