My new plaster is out of the start-up phase, so for the first time last night I fired-up the 1999 Lochinvar Energyrite ERN200 natural gas heater.
It fired right away. No unusual noises. Filter pressure is normal. Return flow is good. "Call for heat" indicator lit when I dialed up the temp.
The flu stack heated up, but the output pipe was barely warmer than the input. So of course in the pool, the water from the return was only a few degrees warmer than the 68° pool water.
I let it run for 90 minutes. Pool temp didn't increase.
I'm assuming a clogged heat exchanger, but before I call for service, does anyone have any guidance or wisdom to offer?
Disappointed & Cold Rollercoastr