Troubleshooting; Water Valve; Pilot Flame; To Clean The Pilot Burner And/Or The Pilot Orifice - Bosch 125B LP Installation & Operating Instructions Manual

The AquaStar 125B burners are activated by a water flow
valve. Numerous water related problems can cause this water
valve to malfunction such as: Insufficient water flow volume
to activate the burners at its minimum flow requirement;
Dirt in the water flow valve causing it to malfunction;
Sediment build-up in faucet aerators, or shower heads;
Uneven pressures between cold and hot. (with single lever
faucets) Plumbing cross overs. These water flow related
problems can cause the heater to deliver less than its full
output, or to fail to ignite or to shut down completely.
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