Its a raypak spartan 121 spa heater the error code 3 comes on,nothing else ,but when i move the terminal on the 3 wire it will come on ,than leave for 2-3 days ,back to same thing again ,i have clean the terminal file it clean and crim the terminal and spray contact cleaner on it ,,still same problem

SOURCE: We just moved into our home and there is no manual

Here is a link for the Manual and trouble shooting guide. Aqualink

SOURCE: Hayward H300 Spa Heater will not fire up

try to replace the thermo sensor it is located on the left side of tghe unit and has 3 wires running to it.

SOURCE: Service light comes on our Raypak RP 2100 pool heater.

this usually indicates a high limit condition.you must first ascertain if you have a component failure or a true high tempature condition.your model has 2 limit controls and they are both located in side panel on water in/out header

John Prohaska

• 1378 Answers
• Posted on Dec 16, 2009

SOURCE: My raypak versa spa heater was making a loud sound

Part one - The 'whoosh' or 'boom' at ignition. If those sounds describe your start up your jet(s) are clogged along the gas manifold. Follow the pipe out of the gas valve down to where the gas is shot into the heater. Those bronze ports have a small opening and spiders like to nest inside this area. Turn them out of the manifold and inspect them. You should find those closest to the ignitor are clogged causing the delay and then boom of ignition.

Part 2 - Have this happen enough and the roll out switch / fused link along the bottom of the heaters service panel will open up and disable the heater. It will look like a black rubber tube about 1/4 diameter by about 2 inches long -OR- a white ceramic block about the diameter of a quarter; either will have 2 wires to it and it will be 'close' to the manifold and jets you need to clean out. If you have a way to read resistance across this switch remove the wires from it and check it. If it is open it will need to be replaced.

thepool

• 78 Answers
• Posted on Apr 22, 2010

SOURCE: i have a Raypak Digital Millivolt pool/spa htr which stopped heat

Don, I suspect the error message is the cause of your problems. A flow error is either real (low flow) or not (bad flow switch). Either way, you get the error code displayed. Always take the filter out of the equation first to make sure it's just not a dirty filter causing the issue. A sand filter can be placed in the "bypass" position or a filter cartridge could be removed. Restart the pump and see if the error code goes away. If it does, clogged filter, real flow problem. Clean / replace the filter. If it does not go away, locate the pressure switch, pull off the two leads and jump them together. If the code goes away, false problem, bad switch. Replace it. Rob