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TROUBLE SHOOTING HINTS
1. Main burner does not fire 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 flow.
c. Check wiring connections between pressure switch and burner.
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.
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).
b. Use resistor between T1 (120V) and T2 for bleed voltage.
CK-63 Wiring Check-Out
Standard Set-up
Page 8
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