"David" wrote in message
om...
Hello, I have an AquaTherm furnace connected with a 40 gallon hot
water heater. When the furnace is on and using the hot water heater,
I get either no or only luke warm water in the house. Does anyone
have any idea what the problem is? Is my hot water heater going, or
is there any adjustment that I can make? Thanks in advance!


Why would you want to heat hot water?

Maybe THAT is part of your problem...