Question about Rheem Tankless water heater for 1-2 bathroom homes, outdoor, LP - Model RTG

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Water Heater will not stay lit.

Once its lit, it will only stay that way for a day or two, then the pilot goes out and we are left with cold water. This problem only started occuring about 2 weeks ago, Please help me solve this problem

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Sounds like you are getting a downdraft . Or a delayed ignition What type of water heater is it ? One that stores hot water like a 30 Gal natural gas or LPG water heater? Tankless don't use standing pilot. Where is the heater? In a closet or a utility room. Whats the condition of the flue pipe. How many bends how long is the run? In other words Please have a licensed plumber check it out because you are dealing with an appliance that produces a poisonous Gas called CO (Carbon Monoxide) It's colorless, odorless, and it kills. And it don't care who.

Posted on Jan 09, 2009

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If pilot flame is weak, the burner parts and pilot tube may need to be cleaned.
Other causes can be bad venting, negative air pressure, low gas pressure, air in gas line, bad gas control valve thermostat, damaged burner parts from exposure to chemicals, etc.

Open following links for troubleshoot resources, including service manuals and illustrations:
http://waterheatertimer.org/pdf/Pilot-outage-troubleshooting.pdf
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