Question about Bosch & Tankless LP Hot Water Heater
Tankless water heater does not turn on. Reads error h2. How do I fix it?
H2 wasnt an error code on those machines... could you check the display and ask again?
Posted on May 06, 2014
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Posted on Jan 02, 2017
Posted on Jan 23, 2009
FA - Gas leakage error, gas valve circuit not closing properly
Posted on Mar 15, 2009
The vent pipe you use is the correct size for the heater.Longer runs require bigger pipe.I also would check to see if the water is getting to hot.
Posted on Mar 16, 2009
Thermo coupler may be defective. it controls the main gas valve by closing main if pilot is out. make sure thermo coupler bulb is positioned over and near tip of pilot flame, but not in the flame. Thermo couplers are inexpensive and easy to change out.
Posted on May 06, 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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