If you're looking for help fixing your Raypak Pool Heaters, look no further! Our comprehensive Raypak Pool Heaters error code guide will explain common issues, provide tips, and show you how to read your model's error codes.

CODE: BD1  
PROBLEM: Board failure.  
FIX:
1. If this code appears and stays on, turn off power to board at toggle switch and source, then re-establish power. 
2. If code reappears, replace board as the main processor failed to start. 

CODE: EEP  
PROBLEM: Indicates that memory failed to start on main processor.  
FIX:
1. Turn off power at toggle switch and source, then re-establish power. 
2. If code reappears, replace board as memory has failed. 

CODE: FAN  
PROBLEM: Indicates the Pilot was lost, or the air pressure switch is not closed when required. 
FIX: 
1. Check for correct incoming power at fan relay- 120V or 240V and at fan motor. 
2. If pilot is confirmed, check for 24V minimum out of fan relay to pressure switch. 
3. If switch does not make when fan is operating, verify the tuning between fan housing and switch is connected and is not kinked. 
4. Soft lock out after 3 attempts - automatically resets after 5 minutes. 

CODE: FFL  
PROBLEM: Indicates a false flame signal.  
FIX:
1. Check to see if pilot is staying lit after CFH is satisfied. If pilot stays lit, the pilot valve in the gas valve is hanging open. Replace gas valve. 
2. If gas valve is working properly, problem lies with the pilot system or board. Turn power off at toggle switch. 
3. Unplug ignition wire from board and pilot and remove green ground wire from burning tray. Clean and reconnect ground wire. 
4. Turn power on. If no spark at ignition module, turn power off and replace the PC board. 
5. If you saw a spark at Ignition Module, turn off the power and reconnect wires. 
6. Turn power on and unit should fire. 

CODE: GVC  
PROBLEM: No power detected at PV or MV when commanded.  
FIX:
1. Turn power OFF and disconnect Ignition Wire and Gas Valve wires from board. 
2. Power ON and watch for spark at module. 
3. If no spark, turn power OFF, and replace board. 
4. If spark is observed, turn off power and reconnect wires. The unit should fire. 
5. If unit does not fire and code reappears, power OFF, disconnect valve wires from board and remove MV, PV, and ground wires. Clean and reconnect. 
6. If unit does not fire, replace the gas valve. 

CODE: GVO  
PROBLEM: Power found at either PV or MV at the incorrect time.  
FIX:
1. Turn power OFF and disconnect Ignition Wire and Gas Valve wires from board. 
2. Power ON and watch for spark at module. 
3. If no spark, turn power OFF, and replace board. 
4. If spark is observed, turn off power and reconnect wires. The unit should fire. 
5. If unit does not fire and code reappears, power OFF, disconnect valve wires from board and remove MV, PV, and ground wires. Clean and reconnect. 
6. If unit does not fire, replace the gas valve. 
7. Low power to transformer can cause a GVO fault. 

CODE: HL1  
PROBLEM: The high-limit has exceeded 135F.  
FIX:
1. Possible excessive water temperature in the tube bundle. Once heater cools, high limits resets automatically. 
2. Check for blockage in tubes. 
3. Check for low water flow. 
4. Check Unitherm governor - replace if necessary. 
5. check bypass assembly - replace spring or bypass if necessary. 

CODE: HL2  
PROBLEM: The high-limit has exceeded 135F.  
FIX:
1. Possible excessive water temperature in the tube bundle. Once heater cools, high limits resets automatically. 
2. Check for blockage in tubes. 
3. Check for low water flow. 
4. Check Unitherm governor - replace if necessary. 
5. check bypass assembly - replace spring or bypass if necessary. 

CODE: IGN  
PROBLEM: Ignition failure.  
FIX:
1. If the unit fails to hold a flame after 3 attempts, it will go into a hard lockout. Interrupt the power supply to clear the lockout and check for air in the gas line or not enough gas pressure. 
2. IGN only appears after pilot has proved and main valve has been powered. 

CODE: ILO  
PROBLEM: Ignition lockout. (Propane units only).  
FIX:
1. The heater has performed too many attempts to ignite the main burner and will take a short break. 
2. Inspect pilot assembly. 
3. If pilot assembly is OK, then the culprit may be your PC board. 

CODE: PRS  
PROBLEM: Low water pressure  
FIX:
1. Check water levels at skimmer face. (should be middle of skimmer face). 
2. Ensure pump is running. 
3. Check filter pressure. Backwash if necessary. 
4. Check heater location- if more than 5 feet above or below water level- adjust pressure switch. 

CODE: ROL  
PROBLEM: Thermal fuse tripped inside heater due to excessive heat or flame roll-out detected.  
FIX:
1. Possible downdraft of burner flame. If sensor has red reset button, press button & determine cause. 
2. Does your unit need a high wind stack? 
3. Check wiring for burns- especially the ground wire and wires at gas valve. 
4. Replace wires if necessary. 

CODE: SNS  
PROBLEM: Temperature sensor is out of acceptable range.  
FIX:
1. Water temperature is below 36F or above 110F 
2. If the two thermistors are more than 2 degrees apart, the SNS code will appear. 
3. Loose or corroded connection at P1. 
4. If the sensor is not mounted all the way into the JACO fitting on the header, it may give a false reading.

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