SOURCE: rheem tankless water heater error code C4 13??
check diaphrapm valve or micro/switch best of luck
SOURCE: the water fluctuate very hot to very cold and
either you main controller is bad, or the thermo couple is faulty
Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/sean_54c3a3dc48a7773c
SOURCE: Hello,
the main problem is...
you purchased a "Bosch" Aquastar.... complete garbage
if you want quality tankless..
Takagi, Rinnai, or Noritz. these are the only tankless I install or work on, very few if any problems.
just look on the board here, most of the problems listed are with the Bosch
SOURCE: my bosch pro tankless nat
http://www.bosch-climate.us/files/201101161946320.GWH425HN_English111104.pdf 7. Poor circuit connections at the ECO (overheat sensor) or the flue gas safety device interrupted. Check that the connections to the ECO and Flue Gas Safety Device are secure and tighten if necessary.
Ignition sparker will not operate if the electrical circuit is
If the 425 HN is Powervented, check spill switch reset
Is the most likely cause of the problem you describe.
Call a qualified service tech immediately.
Gas explosion indicates dirty combustion parts, and gas is not fully igniting when tankless turns on the gas. So gas builds up and then explodes causing serious damage to tankless, and serious risk to homeowner.
If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7
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