I have a OHH flashing error code with cold as heck water. Can it be cleared or is it the system board? The thermistors have a resistance of 37.7 and 37.5 kohms.We've had this spa since new ~'06 replaced the pump 2 years ago. The topside panel became unreadable and was replaced under warranty. That became unreadable several years ago. Function was OK.A few days ago the spa and its top side control began to become unresponsive and had a "mind of its own".I replaced it with a new top side control to read the possible errors.I started with: 'HOt'I cleared that by doing a power down-TEST MODE (using DIP SWITCHES)-power upnow I have the 'OHH' Any help or direction will be greatly appreciated!Tim