HTP PHP199-119 - Page 47

47
LP-454 REV. 1.6.15
Table 14 - NOTE: If you replace a part to remedy a fault, it is recommended that you cycle the unit at least three or four times to assure the
fault has been resolved.
F13
Combustion fan speed
incorrect – The heater will lock
out if it senses that the fan
speed is less than 70% of
expected rate for more than 60
seconds.
1. Check the combustion air fan wiring.
2. Replace the combustion air fan.
3. Replace the control board.