hear a clicking sound behind my radio

2003 FORD EXPLORER
Avatar
HKTAYLOR
  • MEMBER
  • 1 POST
Air Conditioning problem Four Wheel Drive Automatic 150000 miles

When I turn my gauge from AC to heat, I hear a clicking sound behind my radio. The engine temp gauge shows the engine is ok, but I am not getting any heat inside the car. Can you help me.

Thanks

HKTaylor
Nov 23, 2008 at 4:40 PM
Advertisement
Avatar
DAVE H
  • CAR REPAIR CONTRIBUTOR
  • 13,384 POSTS
sounds like the blend door is not operating .. you need to check the vacuum pipes etc. unfortunately the only way to do this is by strippng down the dashboard ?

The temperature control switch:
is a potentiometer that outputs a variable voltage to the temperature blend door actuator to set the position of the temperature blend door.
initiates closing of the heater control valve. When set to full COOL, a lever on the temperature blend door pivot shaft depresses the pintle of the heater control valve vacuum switch. The heater control valve vacuum switch then applies vacuum to the heater control valve, closing off engine coolant flow to the heater core.
is serviced only with the climate control assembly.
Nov 23, 2008 at 6:12 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.