Question about Bosch 1600H-NG Natural Gas AquaStar AquaStar Natural Gas Tankless Water Heater...
The unit just stopped producing hot water. the voltage on the hydro generator is 0.5 vac. how do i know if the control board is good or bad
That voltage does not seem high enough. Supposed to be 1.6 VAC and I got 2.5 VAC. Do you have the water flow turned to the maximum? Is there something blocking water flow? The hydro voltage should be checked separetly from everything else, so if you can't get the VAC higher, my guess would be that's the problem.
Posted on Nov 19, 2014
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
SOURCE: bosch aquastar Aq125-hx does not
That particular tankless water heater has hydro-generated ignition. In order for it to function, it requires a certain water pressure and velocity. You can try turning on the hot water in two location in your house to see if that gets it started. If it does, try getting a higher flow shower head, or removing the limiters in your faucets.
Posted on Jan 07, 2011
Possible flow sensor issue. Check to see if your water pressure fluctuates a lot or is fairly steady. These units are sensitive to the pressure. take care.
Posted on Mar 04, 2011
SOURCE: roblem with the Bosch 1600H-NG
Problem could be air supply, gas supply, venting, part failure or combination of listed things.
Best place to start is manual.
Typical 1600 manual shows troubleshoot starting page 19
Bosch has online tech support form:
BOSCH error codes:
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Posted on Mar 05, 2011
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