The heat in the car is not working, the fan is working but the water temp is not rising. Could be the thermostat or something else? Thanks
Dec 19, 2012 at 8:45 PM
1994 Chevrolet Suburban Heat Car Working Fan Working Water Temp Rising Could
1994 CHEVROLET SUBURBAN
ANONYMOUS
- MEMBER
- 1 POST
Advertisement
DOCFIXIT
- ✓ASE Certified Mechanic
- 18,828 POSTS
Good place to start change out thermostat
Dec 19, 2012 at 8:47 PM
WRENCHTECH
- ✓ASE Certified Mechanic
- 20,761 POSTS
You need to have some idea what is going on before you start throwing parts at it. It sounds like you are assuming engine temp but have not confirmed anything.
With the engine at full operating temp, locate the 2 heater hoses where they go into the firewall and feel them to see if they are both hot to the touch. If only one is hot, the heater core may be plugged. f neither is hot, the engine temp may be low. If they are both hot, the heat in that vehicle is controlled by a blend door that regulates heated air flow. it is operated by an electric motor/actuator. The problem can be that the actuator is stripped or inoperative or the door itself could be damaged. This is what needs to be determined by examining the actuator and see if it is responding to heat change commands or not.
With the engine at full operating temp, locate the 2 heater hoses where they go into the firewall and feel them to see if they are both hot to the touch. If only one is hot, the heater core may be plugged. f neither is hot, the engine temp may be low. If they are both hot, the heat in that vehicle is controlled by a blend door that regulates heated air flow. it is operated by an electric motor/actuator. The problem can be that the actuator is stripped or inoperative or the door itself could be damaged. This is what needs to be determined by examining the actuator and see if it is responding to heat change commands or not.
Dec 19, 2012 at 8:50 PM
hopefully that will fix the problem, but i wondr, what else i should do if it is not the thermostat??
Dec 19, 2012 at 9:04 PM
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.