What should I do no heat fan blows on AC but do.

Tiny
ANONYMOUS
  • 1979 FORD F-150
  • 97,704 MILES

What should I do no heat fan blows on ac but do not blow heat when you turn on heat

Monday, February 11th, 2013 AT 12:56 PM

1 Reply

Tiny
HMAC300
  • EXPERT
  • 45,785 POSTS

Check to see if both heater hoses are hot. It may be a bad water valve not letting heat go through to heater. Check for a vacuum leak also check for a bad blower relay and check behind switch it may be burnt up when put on heat.

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Monday, February 11th, 2013 AT 3:17 PM

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