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I have a ccb-150 that ran goo for about 6 months of installation, then errors like A48, then A01 not sure what else codes started left and right, keep on reseting it and now and now it stop producing hot water on demand, meaning I open the hot water valve and nothing happens, but once I unplug it and plug it back ignition comes on and if I open the hot water valve I got continuos hot water, once I shut off the valve and turn it back on ignition does not happen,
getting frustrated to the point of trashing it.