Skip the auto shop - Our mechanics make house calls

Q: Does blocking heater horses causes overheating?

asked by on

I realized that water was leaking somewhere under the dash on the passenger mats so I assumed it was coming from the heater horses and it was causing the temperature to rise on the dash.I opened the bonnet and blocked the horses then it stopped but now the water is not circulating and the car is overheating.Does blocking water from circulating on the heater horses causes overheating on the engine?

A: Hello. If the heater hoses are an integral ...

Hello. If the heater hoses are an integral part of the cooling system, as is the case with most vehicles, then blocking them off can indeed result in engine overheating. Blocking off hoses that are a part of the cooling system can prevent flow, which can quickly lead to overheating, and serious engine damage. Depending on the cooling system setup, some heater hoses can be bypassed, which will cut off flow to the heater core, but still allow flow through the system.

If the heater hoses are leaking, I would recommend having a professional technician, such as one from YourMechanic, visit your location to diagnose the overheating issue and replace any hoses as needed.

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: overheating quickly, busted hose from coolant tank and will not hold antifreeze.

Hi. The usual cause of a hose to split like that is the hose being old and the rubber of the hose not holding the pressure of the coolant system causing it to split or buster. This hose is either...

Q: Should I have a massive cooling system replacement done?

To answer your last question first, if the truck is "overheating", you can't drive it at all, not even to a repair facility. Overheating, if severe enough, has the effect of warping the cylinder heads, block, and manifolds. Even if...

Q: I am leaking antifreeze

Hi, thanks for your question. I'd be happy to help. You can make a note of where you notice the leak, then have a mechanic come to pressurize the cooling system and isolate the leak for you. The water pump...

Related articles

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.