heater runs on all speeds but no heat.

Asked by Nov 05, 2014 at 06:59 PM about the 1999 Ford F-250 Super Duty XLT Crew Cab LB

Question type: Maintenance & Repair

the heater will not blow any heat no matter where I set the selector.

2 Answers

60

Heater core is probably clogged.

4 people found this helpful.
13,730

check your fluid level. when was the last time the cooling system was flushed? If you flush the system change your stat.

2 people found this helpful.

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