try craigslist and use the saved search same thing with feebay. it will email ya when one is posted or listed. good luck
jay the pool pump repair guy Longwood FL
Need more info, model and over all condition. I would check the capacitor on the motor first and then the multi-port valve. Make sure you are shutting the pump off when moving the handle on the multi-port .
Try replacing the temp sensor. You can test the temp sensor if you have an ohms meter that can read k-ohms. If the sensor is good then the board is probably not reading the sensor properly.
You may be looking at replacing one or both boards. Make sure the air flow is not blocked and there is no damage to any of the wiring. The igniter is Error code-10 however if the igniter is good then the board will be the issue.
Get a pool heater pro in to look the heater over. Depending on the age and overall condition of the unit repairs might be to costly. A newer more efficient unit might be a better way to spend your money and save money every time you use the heater. If you call a local pool company they may be able to recommend someone. Good luck.