360Mitch

CanadianSpaTech, I would like to apologize for my comments in my previous post. That you took the time to reach out on my post, is much appreciated. Had the sensors not cured my problem I would still be looking for your help. I have edited my previous post and removed the uncalled for and unjust comments. In the future I will be the one to read post more closely and respond in a more appropriate manner. Again, I hope you will accept my appology. Sincerely Mitch Forry

RDspaguy, You are the SPA GURU! You nailed it. Installed a new set of Balboa M7 sensors from Spa Depot. Spa powered up normal and went into PR. Selected pump one and it came on low speed. New upper spa panel, from My Spa Parts Store, indicated temp at 65 deg. Four min later the heater indication came on. Selected pump number two and it came on. Selected both pumps to high and no issues. 10 hours later temp indicates 102 deg and everything working great. We looked at new spa's in the range of our current Marquis Epic 2009. They ranged from $13,000 to $15,000. Putting a little research and $1,500 I replaced one pump with improved model, new temp sensors, control panel with dead display with new LED version, new pillows and most of the control valves. Its like a new spa. Currently researching ozone generators to replace the old Marquis. Not many good reviews with short life span being the biggest gripe. CanadianSpaTech, I do appreciate you responding to my post. Thank you. Thank you Pool Spa Forum for this site and again to RDspaGod for solving the malfunction. Mitch Forry

Thank you for the response SpaGuy. Sensors on order as I couldn't find them locally. Added some pics of circuit board. Will update when the new sensors are installed.

2009 Marquis Epic Spa Arrived at spa to find it cold and no power. Found GFI tripped. Reset GFI and panel powered up and displayed HOT. No controls will work. Set dip switch one to ON, cycled power. Set dip switch one to OFF and cycled power. HOT code cleared and now displays OHH. Found #1 Spa Pump failed with bearing locked up. Replaced Pump with new. Cleaned spa and filters. New pump turned on and ran for 1 min and shut down with flashing OHH code. Using meter, measured spa heater element disconnected at 10.5 ohms. With heater disconnected it has no effect or change to code. Measured water temp in tub at 65 deg. Measured water temp inside heater core at 65 deg. Measured Balboa M7 sensors at 36,100 ohms (69.3 degrees) and other at 37,210 ohms (68.1 degrees). I am using Balboa Temp & High Limit Sensor Chart. At one point the pumps turned on and I had full control from top control panel. Temp set for 89 deg. Temp indicated 111 deg. It then went to 112 deg and pump turned off and OHS code appeared. While it was working I had the filters removed and had excellent flow from both pumps. Cycled power again and OHS code cleared and OHH code immediately appeared. At this point I have no control at top panel and nothing works. Approximately every two hours pump 1 turns on low for 1 minute with OHH code flashing and pump turns off within 1 minute. I replaced upper control panel at the same time as pump. Checked all fuses and all check good. Power to GFI checks good. Power at Spa Circuit board checks good at 241.9 volts. Red to White 120.8 volts. Black to white 120.8 volts. Could my circuit board be causing the problem?

Did you ever resolve your spa OHH code issue. I have the same problem. Started with HOT code. Then became OHH code. One time it showed the temp at 112 deg with the actual water temp 69 deg. Temp sensor check good and heater.