heater control f550 not working low speeds and no temp control

2008 FORD F-550
167,000 MILES
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GIRLING
  • MEMBER
  • 1 POST
1st & 2nd speeds not working .temp. control has only hot no cold.
Nov 29, 2011 at 10:38 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Check and test the blower switch,blower motor resistor/fan control module and check the air blend door/actuator
Nov 29, 2011 at 10:46 PM
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