Quote Originally Posted by chillerout1 View Post
again did you check pump gpm? the problem may be a fouled heat exchanger
No, we have not been able to check the flow rate from any of the pumps. There is not fittings on each side of the pump to plug into. To install fittings, we would have to drain the tower and the main loop. Something I hope to do when it cools down.

I agree we may have a fouled heat exchanger, but at the current moment the only thing I can measure is amps going to the pumps.

On the main loop side, I did notice we have a pressure guage on the supply and return. They are showing 33 PSI supply to the building and 22 PSI return from the building, so roughly 11 PSI drop through the building loop.