Please contact us so we can better assist you. Unsure of what something on this page means? Replacing the heater and/or pump with a new one is recommended if any of those scenarios apply. If a burned relay was powering a pump and all electrical connections are tight then the relay is probably old and worn out or the pump might be bad or going bad or all three. If all connections are tight and if the heater is good then the heater relays are probably old and worn out.

Tip: Burned circuit boards or burned heater relays are often due to a loose electrical connection or a bad heater or both. Contact us by phone for more details on testing a heater. You may narrow your search by selecting a certain category, manufacturer or partial part number. Find a Marquis Spas compatible Filter easily by size or part number. Enter the keywords you would like to search for within our product names and descriptions. Note: A continuity test is not a sufficient heater test. Use the form below to search the thousands of products we have available for sale online. Tip: When replacing a hot tub circuit board, testing the heater and replacing it (if bad), is recommended before installing or applying voltage on a new circuit board.

Otherwise, set wires and/or jumper pins and/or dip switches on the new circuit board to match how they are on the existing circuit board (assuming the old circuit board is already set correctly as per the original wiring diagram on the existing control box). If a wiring diagram is shipped with this new circuit board (or emailed) then it shall override your existing wiring diagram.

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