I have no heat. Will a bad heater core make my car run hot?
Feb 5, 2012 at 10:58 PM
1995 Volkswagen Golf Will Bad Heater Core Make Car Run Hot
1995 VOLKSWAGEN GOLF
GREG3306
- MEMBER
- 3 POSTS
Advertisement
RASMATAZ
- ✓ASE Certified Mechanic
- 75,992 POSTS
Check the thermostat and the heater core if its clogged, and also the air blend door could be stuck in the cold position
Feb 5, 2012 at 11:03 PM
EXOVCDS
- ✓ASE Certified Mechanic
- 1,883 POSTS
A bad heater core should not make the car run hot. If coolant is
not circulating in the cooling system, then the heater core will
not receive any warm coolant... which will result in NO heat inside
the vehicle.
If the water pump belt is broken, then the engine will run hot and
you will not have any heat inside (because no coolant is circulating).
If the belt is on the water pump, it could be a faulty pump impeller.
Some pumps have plastic impellers that break... resulting in no
circulation of coolant.
A stuck closed thermostat will also cause the engine to run hot... but
you would still get heat inside the car, because coolant is still
able to circulate (as long as the water pump is working).
not circulating in the cooling system, then the heater core will
not receive any warm coolant... which will result in NO heat inside
the vehicle.
If the water pump belt is broken, then the engine will run hot and
you will not have any heat inside (because no coolant is circulating).
If the belt is on the water pump, it could be a faulty pump impeller.
Some pumps have plastic impellers that break... resulting in no
circulation of coolant.
A stuck closed thermostat will also cause the engine to run hot... but
you would still get heat inside the car, because coolant is still
able to circulate (as long as the water pump is working).
Feb 19, 2012 at 12:25 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.