Raypak 100-10000345 Digital P.C. Board/Control for 206A, 266/266A, 336A, 399/406A, 207A, 266L/267A, 337A, 399L/407A and 156A Pool Heaters

This is the control board for Raypak's digital gas pool and spa heaters. Raypak's Digital Tool Box Guide calls it the circuit board for ignition and temperature control: the pilot spark comes from the board, and the pilot valve and main valve outputs are 24 VAC terminals on it.

• Also listed for the Raypak 156A digital above-ground heater (not the analog 106A).
• Not for millivolt versions of these heaters, which use a mechanical thermostat.
• The board's 5 amp fuse is a separate part, Raypak 013733F.
• The heater's service menu shows the supply voltage at the board; Raypak gives 24 to 29 volts as the normal range.

Good to know: Raypak's Digital Tool Box Guide shows break-off tabs on the digital control board. The Low NOx tab is broken off for 207 to 407 models only and left in place on atmospheric 206 to 406 models, and there are two propane tabs (15 second and 90 second). A replacement board has to be set up to match the heater.

Raypak's stocking list describes this board as the PC board controller for digital heaters built after 11/2003, and the Digital Tool Box Guide says the current circuit board is backwards compatible with all digital heaters made since 2004. Even so, the older number 013464F is still the one printed in Raypak's parts lists for the R185B to R405B digital heaters (built 2003 to 2004) and for the 408A. Confirm with Raypak before ordering for those models.

Control board diagnosis and replacement on a gas heater are for a qualified technician. Video of a technician replacing this board: https://youtube.com/shorts/OkFx_TNDH_8