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Pilot Stays Lit But Main Burner Will Not Light On Water Flow |
| Possible Cause | Solution |
| Center (Pilot) Button Full gas lever not properly positioned. | Depress full gas lever tab to allow center (Pilot) button to come out flush with other two buttons. |
| Incorrect water pressure. | Insure that constant water pressure is above 33 PSI. Set well system pressures Min-35 PSI / Max 55 PSI. |
| Low Water flow caused by blocked water screen or improperly set water throttle. | Clean the debris from the inlet cold water screen and reset water throttle to achieve 2 GPM flow. |
| Faulty diaphragm. | Replace the diaphragm assembly - Pt No. PMG 10-12460. |
| Automatic gas valve push rod that the diaphragm pushes is dirty or jammed. | Dismantle clean and regrease using silicone grease. Handle the push rod with care, do not bend. |
| Slow ignition screw incorrectly set.(This is located on the diaphragm housing above the left sensing tube entry port. | Turning the screw clockwise delays the ignition, counter-clockwise advances the ignition. Never turn the screw fully clockwise and leave it. When correct the burner ignition should be smooth and quiet when a hot water faucet is opened. To set, turn fully clockwise to stop and then turn back (counterclockwise) 1 1/4 turns. |
| Thermostatic Slide Valve Sticking. ( Pt. No. PMG 10 / 14536) | Dismantle, Clean and Lubricate with silicone grease. Do Not Overtighten Thermostat Bellows screws, collapsing metal spacer. |