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TROUBLESHOOTING HINTS
1. Main burner does not re when thermostat calls for heat with venter operating.
a. Check pressure switch adjustment. (LED should be lit when there is voltage from T1 – T2 and the pressure
switch is closed.)
b. Check fuel ow.
c. Check wiring connections between pressure switch and burner and yellow mode wire connection.
d. Check pressure switch for continuity across terminals, during venter operation.
2. Venter does not activate when thermostat calls for heat.
a. Jump wire the terminals L1 and M to ensure motor operation.
b. Check wiring connections including yellow mode wire.
c. Check cube relay for proper insertion. Remove and reinstall relay. Check for operation. Replace relay if not
functioning properly.
3. Flue gas odor.
a. Check system draft.
b. Check post purge venting time.
c. Check for negative pressure in building.
4. Power venter cycling.
a. Check voltage between T1 and T2 and refer to Wiring Check-Out Standard Set-up (see below)
REPLACEMENT PARTS LIST
Description Part Number
Pressure Switch 46273100
Board Replacement Kit
(includes relay)
46399200
WMO-1 46086900
YEARLY MAINTENANCE PROCEDURE FOR POWER VENTER
Motor: Inspect motor once a year; the motor should rotate freely. Lubricate motor with 6 drops of SWG
Superlube in each oil port hole annually.
Wheel: Inspect venter wheel annually, for oil red heating systems, clear any soot, ash or coating, which
inhibits either rotation or air ow. Remove all foreign material before operating.
Vent System: Inspect all vent pipe connections annually for looseness and for evidence of ue gas leakage.
Seal or tighten pipe connections if necessary.
P/N 46400900 Rev P 08/19
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