20 Most Recent Bosch ProTankless GWH C 800 ES LP Tankless Water Heater, Propane Questions & Answers


Glad it worked out so easily.
Be sure to perform the regular maintenance as shown in manual to prevent common error codes.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Bosch... | Answered on Sep 27, 2012


if this is what the problem thing says it is then this type of water heater requires a special instaliation ,the room its in must be ventilated with permant vents through to a outside wall ,then a special valve in the flue pipe to prevent blowback down the chimmney also another valve in the flue to shut off heater in case of a partial blockage liuke a birds nest .If you are not sure of exactly what to do and the security and safety measures that go with this type of heater then get a plumber in unless your mounting it outside in a roofed over space with no sides like a porch .

Bosch... | Answered on Dec 25, 2011


id say if the plumber charged you to call him back right away

Bosch Water... | Answered on May 06, 2019


ABSOLUTELY NOTHING YET AS IT HAS NOT FAILED . WHY MAKE A MONEY PIT OF IT BEFORE ANY THING GOES WRONG ?A GOOD PRE-FILTER MIGHT HELP AS MUCH AS ANY THING ELSE

Bosch Water... | Answered on Mar 26, 2019


It could be the thermostat sensor They usually have a carbon buildup. They are easy to install and not that expensive. Good luck

Bosch Water... | Answered on Mar 26, 2019


as with all water heaters they need flushed once in awhile to get rid of sediment in the bottom of the tank . knowing this from the get go most of us never seem to get around to doing it . even myself but I do have a unit that is supposed to prevent this by the dip tube that was built in has circular action in the bottom of the tank

Bosch Water... | Answered on Jan 20, 2019


iF YOU RAN OUT OF GAS, THE LINES MAY NEED TO BE PURGED OF AIR. dISCONNECT THE GAS FLEX AND TURN THE GAS ON TO PURGE THE AIR FROM THE LINE. dO THIS UNTIL YOU GET A STRONG SMELL OF GAS. aLSO, WHEN YOUR UNIT TRIES TO LIGHT, BUT THERE IS NO GAS, IT WILL TRY TO LIGHT THREE TIMES. aFTER THE THIRD ATTEMPT, THE UNIT LOCKS OUT. yOU MAY NEED TO RESET IT BY UNPLUGGING IT, OR IF IT IS HARD WIRED, JUST TURN THE BREAKER OFF FOR 10 SECOINDS AND THEN TURN BACK ON. tHIS WILL RESET THE GAS VALCE TO RELIGHT. gOOD LUCK!

Bosch Water... | Answered on Oct 03, 2018

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