Originally Posted by Lyon
Thanks everybody. replace with a T and manual valves. No leaks but no hot water. I have water flowing from the hot water side but it is cold. Started engine because the hot water heater using electric, gas or engine water to heat.
Suspect it is a Solenoid BYPASS set up
Solenoid OPEN allows COLD into Hot water plumbing lines (check valve on WH Tank Hot out prevents backflow)
Solenoid Closed allows Cold to flow thru to COLD plumbing lines
If you have Valve on HOT line it should be CLOSED for Normal Operation
Valves on Cold should be OPEN
*Bypass....Open the HOT valve