Question about Bosch AquaStar Indoor Natural Gas Tankless Water Heater with Vent Hood #125
Posted by Anonymous on
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Posted on Jan 02, 2017
There are three electrodes (connected next to each other by a single piece of metal) that run up into the heat exchanger. They are situated behind the black plastic air intake in the lower half of the unit. Pull out the electrodes and clean them off with steel wool or fine sand paper. Also take the opportunity to blow the dust out of the inside of the unit and clean out the air intake.
Posted on Jun 15, 2009
if you have incorrect gas line size when it kicks on the lack of gas pressure to the unit will cause a wistling. make sure you have enough gas to the unit
Posted on Jul 29, 2009
SOURCE: ec code come up & no hot water
Open up the front cover - look at the printed curciut board and see if you have two or three capacitors that the tops are slightly raised...if so, those capacitors on the board need to be replaced...they should be competly flat.
Posted on Dec 05, 2009
The 250 MUST have the condensate line connected. EC comes from gas supply problems and CO2 levels not being adjusted. LP units require 3/4" smooth gas pipe or 1" corrugated pipe minimum size. The LP regulator needs to be turned up to about 13 inches of water column and with all the gas appliances on, measure no less than 11 inches of water column. The CO2 levels must be measured by a qualified gas technician with a calibrated (with in 6 months) CO2 analyzer.
Posted on Apr 11, 2010
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