Skip the auto shop - Our mechanics make house calls

Symptoms of Bad or Failing Heater Hoses

heater hose

Bad or Failing Heater Hoses Inspection

by a top-rated mechanic at your home or office

Heater hoses are rubber hoses found on virtually all vehicles equipped with internal combustion engines. Their main purpose is to transport coolant from the engine to the heater core located inside of the vehicle. They are often premolded into specific shapes, or cut to specific lengths in order to accommodate the setup of the vehicle’s cooling system. They are usually located at the rear of the engine, near the firewall, connected to the heater core outlets, or the heater control valve. Automotive cooling system hoses are made of heavy duty materials, and are designed to withstand exposure to the heat and chemicals of the engine’s coolant. Over time, however, they can wear out, leak, and begin to have issues. Usually a bad or failing heater hose will produce a few symptoms that can alert the driver of a potential issue.

HAVE SYMPTOMS OF CAR TROUBLE?
Get an $80 diagnostic
by a top-rated mechanic at your home or office.

Get a quote · Book an Appointment · Our expert mechanics come to you.

1. Cracked hoses

One of the first visible symptoms of an issue with the heater hoses is visibly dry, or cracked hoses. As the vehicle approaches high mileage the coolant hoses will eventually begin to wear, dry, and may eventually crack. Hoses that are visibly cracked will be structurally weakened and may be more prone to coolant leaks. Visibly cracked hoses should be replaced if possible, to prevent them from possibly leaking.

2. Coolant leaks

One of the first symptoms of a an issue with the vehicle’s heater hoses is coolant leaks. The heater hoses are designed to be resistant to coolant and heat, however over time they can eventually wear out. Old hoses can break down, weaken, and eventually rupture and leak. A leaking heater hose will not only produce a coolant leak that may leave puddles of coolant under the vehicle. If left unattended coolant leaks can eventually progress into more serious issues.

HAVE SYMPTOMS OF CAR TROUBLE?
Get your car fixed at your home or office.

Get a quote · Book an Appointment · Our expert mechanics come to you.

3. Engine overheating

Another symptom of an issue with heater hoses is engine overheating. If the heater hoses leak enough, the coolant loss will compromise the effectiveness of the cooling system and cause the vehicle to overheat. Any issues that cause engine overheating should be addressed as soon as possible to avoid the potential of serious engine damage occurring.

Usually heater hoses will begin to show signs of visible exterior wear long before they leak, however this is not always the case. If you suspect that your vehicle’s heater hoses may be having an issue, have the vehicle inspected by a professional technician, such as one from YourMechanic, to determine if the hoses should be replaced.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Still not sure about your car's issue?
Diagnose your car
What kind of issue are you experiencing?
Brakes are squeaking
Car is not starting
Car is overheating
Car is shaking (vibrating)
Fluids are leaking
Heating and A/C
Smoke or steam is coming out of the car
Warning light is on
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....
How to Get a Louisiana Driver's Permit
s licensing program. The first step in this program is to obtain...
P2159 OBD-II Trouble Code: Vehicle Speed Sensor B Range/Performance
Diagnostic Trouble Code (DTC): P2159 P2159 code definition Vehicle Speed Sensor B Range/Performance...


Related questions

Q: DPF (Diesel Particulate Filter) melted

Hello. The DPF functions by trapping certain diesel particulates, and periodically goes through a regenerative cycle to burn those particulates (i.e. when you're on the motorway and get the temperature high enough to regenerate). This is a bit speculative, but...

Q: Power steering pressure line replacement.

If you are having trouble lining up the pressure hose to the power steering pump, then try removing the bolts that secure the pump to make the pump loose and then put on the hose. Then you can draw the...

Q: AC compressor not working

AC systems have pressure switches that must be applied for power to go to the compressor clutch and turn it on. I would be willing to bet that your system has a leak that needs to be repaired before it's...