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Heater Realy Board 76858 - Bubbles Supply

Heater Realy Board 76858

Part #: 76858

$259.63
In stock — ships today
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1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this heater

The Hot Spring Spas Heater Relay Board (part #76858) is a genuine OEM printed circuit board designed to control heater operation in Hot Spring spa systems. This Eagle-manufactured relay board manages the electrical switching that activates and deactivates your spa's heating element, ensuring consistent water temperature control.

When your spa displays HH (high limit) or OH (overheat) error codes, this relay board is often the solution. At Bubbles Supply, we stock only authentic Hot Spring parts with exact fit guaranteed for seamless compatibility. Every heater relay board ships same-day and includes our comprehensive 1-year warranty for complete confidence. Installation requires basic electrical knowledge and should be performed with power disconnected - ensure proper wire connections match your existing board configuration before energizing the system.

Exact part number

76858

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Also known as / Replaces

This part replaces or is interchangeable with:

  • heater control board
  • heater switching board
  • Hot Spring heater relay board
  • PCB 76858

Looking for an older part number? Check our supersession lookup tool

Common symptoms this part fixes

If your spa is showing any of these signs, this part is likely your fix:

  • HH (high limit) error code displayed on control panel
  • OH (overheat) error code that won't clear
  • Heater not activating despite correct water flow and temperature settings
  • Spa heats intermittently or inconsistently
  • Heater element tests good but spa won't heat
  • Relay chattering or audible clicking from control box with no heat output

Not sure if this is your problem? Try our diagnostic centre or .

Before you buy — quick checklist

  • Confirm your spa displays HH or OH error codes — this board targets those specific fault conditions
  • Verify your existing board's part number is 76858 before ordering
  • Rule out a failed heater element or flow/pressure sensor before replacing the relay board — those are cheaper fixes
  • Disconnect power and photograph all existing wiring connections before removal
  • Confirm your Hot Spring spa model is compatible — consult your owner's manual or call Bubbles Supply if unsure

Reading the checklist now prevents 90% of returns. Worth the 60 seconds.

Install difficulty: Medium — Some experience neededTypically 45-90 minutes

Warranty

1 year warranty against defects

Covers manufacturing defects. Does not cover improper installation, normal wear, or accidental damage.

Warranty claims: warranty@bubblessupply.com

Perfect Fit Guarantee

Ordered with our help and the part doesn't fit? Contact us before installation. We'll resolve it with an exchange, replacement recommendation, or return approval.

Learn about our Perfect Fit Guarantee →

Shipping

We ship across the US and Canada. US orders ship from our US warehouse to US customers; Canadian orders ship from our Canadian warehouse to Canadian customers — no cross-border shipping, no surprise duties. In-stock orders placed before 3pm CT ship same day. Standard shipping $9.95 flat rate. Free shipping on orders over $200. Express options available at checkout.

Returns

30-day hassle-free returns on unused parts in original packaging. Contact us before returning to receive your RMA number.

Frequently asked questions

Check the Compatibility section above to confirm fitment for your spa brand and model. If your model is not listed, use our fitment selector at /pages/find-my-part or ask our parts AI for a personalized recommendation.

In-stock orders placed before 3pm CT ship the same day. You will receive tracking information by email as soon as your order ships.

We accept returns within 30 days of delivery for unused items in original packaging. Email returns@bubblessupply.com with your order number to start a return. Installed electrical parts cannot be returned for safety reasons.

Yes, all new parts come with a 1-year warranty against manufacturing defects. Warranty does not cover damage from improper installation or normal wear and tear.

Customer reviews

AI Fitment Assistant

Tell us your spa model and we will confirm this part fits before you buy.

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