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GAS MODELS...
1. Low and/or inconsistent gas pressure.
Natural gas pressure...3.5 inches (8.7 mb) of water column (W.C.).
Liquid propane (L.P.) gas pressure...10.5 inches (26.1 mb) of water column.
2. Poor air/gas mixture at burner (too much gas or not enough air) at the burner, yellow or poor flame pattern...
a. Not enough make-up air.
b. Restriction in the exhaust ductwork.
3. Sail switch is fluttering...
a. Lint screen is dirty or
is not being cleaned often enough.
b. Restriction in the exhaust ductwork.
4. Gas supply may have too low a heating value.
ELECTRIC MODELS...
1. Not enough make-up air.
2. Restriction in the exhaust ductwork.
3. Lint screen is dirty or is not being cleaned often enough.
4. Blower (impellor/fan) is rotating in the wrong direction (for 3-phase [3ø] models only).
5. Failed electric element(s).
6. Sail switch is fluttering...
a. Restriction in the exhaust ductwork.
b. Sail switch is not adjusted properly.
STEAM MODELS...
1. Low steam pressure.
2. Insufficient make-up air.
3. Lint screen is dirty or is not being cleaned often enough.
4. Restriction in the exhaust ductwork.