Question about Bosch AquaStar Indoor Natural Gas Tankless Water Heater with Vent Hood #125

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Pilot light will not stay on Bosch natural gas tankless water hea

Bosch Tankless water heater Pilot light on an 8-10 year old unit. About every 3-4 months the pilot light will go out. Today, when this happened, the pilot light would come on but not stay on. This happened after I left for work. My wife has restarted the pilot light several times but was not able to get it to work today. Suggestions are appreciated. Thank you.

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Check to make sure the flame of the pilot is hitting the thermocoupling. If not then you can use compressed air to clean the pilot port and relight and check again. If the flame is hitting the thermocouple, then it may need to be replaced.

Posted on May 05, 2010

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Posted on Jan 02, 2017

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