20 Most Recent Bosch PowerStar AE9.5 Electric Tankless Water Heater... - Page 8 Questions & Answers

If the control board or fan motor got wet they should be replaced. C7 means not sensing fan motor rotation during start up

If the dial for low medium & hot is set for hot, then the thermostat is probably out.

check hot water pressure valve

Copy following links to identify electrical wiring: http://waterheatertimer.org/See-inside-main-breaker-box.html http://waterheatertimer.org/images/Inside-Main-Breaker-Box-12.jpg http://waterheatertimer.org/Malibu-power-pack-stopped-working.html#240-120 Add a comment and describe what you are working on. Gene h If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

It the motor there are carbon brushes in there when they wear down they don't touch commutator... on motor what u here is arcking u shud b able to re place them u will need a model number and make, ..or remove motor and take with u to get right brushes if the moyor is badly burnt u will need to replace it if u continu to use like this it will only get worse

Sounds like Rheem tankless computer error code:Copy following link:http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.htmlAdd a comment and describe product in detail.If tankless computer is older than 5 years, then replaced with tank-type heater for longer live and fewer problems.Geneh If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

What is model number?