Spoke to John in Parts, and he mentioned I should look into getting a control unit which is used to adjust temperature of water. Pool/ spa button is not working as pool water temperature is probably above set temperature. I can’t adjust temperature control to set temperature to 82 or 83. Right now temperature is set at 78 and pool water is at 78. Can you advise me if unit is worth repairing or new control unit is necessary. What is cost of new control unit?
John said that control unit is easy to install.
FYI I purchased Dynapro pool pump from Aquatech and installed pump and rejigged PVC piping.
Also heater makes whining noise after extensive heating 4-5 hours. If I take heater cover off whining gets reduced. Gas meter and piping from regulator has already been reduced. Pool heater is 8 years old.