Over the years, some heater relay boards for the 2001 to 2008 Hot Spring models have occasionally had issues with overheating and burning out. Rather than getting a new hot tub, this part can be replaced. If you're not sure whether or not the heater relay board is the issue, it can be tested on a voltage meter.  If you're not comfortable doing the job yourself, hire a professional or ask someone who is familiar with electronics.

The 74618 Hot Spring heater relay board carries a new replacement design. The connecting points have been improved, making the board function more efficiently and last longer.

After removing the old board, you can reconnect the new one using a few tools and by following the directions on the manufacturer's specifications. The new design connects power differently than the original part. For example, the neutral wire from the heater power cord, which is white, has a separate connection on the terminal block. This minimizes stress to the relays and improves voltage transfer. Although the ground wire connects the same as the former Hot Spring heater relay board, the black wire connection is now seated in the H1 position.

You can find a Hot Spring Heater Relay Board using our Hot Tub Spa Supplies parts finder. Just plug in your model and model year, and you'll find the spa replacement part you need.