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IQ2020 Heater Relay Board 77118 - Bubbles Supply
Exact Fit

IQ2020 Heater Relay Board 77118

Part #: 77118

$695.06
In stock — ships today
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Also replaces

77118
1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this heater

The IQ2020 Heater Relay Board 77118 is an OEM replacement circuit board designed for Hot Spring Spas and Watkins spa systems. This genuine control board manages your spa's heating functions and helps resolve common heater-related error codes including HH (high heat) and OH (overheat) conditions that can disrupt your spa experience.

Built to exact factory specifications, this relay board ensures precise heating control and system protection. At Bubbles Supply, we guarantee an exact fit for your Hot Spring spa with our authentic OEM parts, backed by our comprehensive 1-year warranty. Every order ships the same day from our Canadian warehouse, getting your spa back to perfect operating condition quickly. Professional installation is recommended to ensure proper wiring connections and system integration with your existing IQ2020 control system.

Exact part number

77118

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 77118
  • 77118 relay board
  • Hot Spring heater control board
  • IQ2020 heater relay board
  • Watkins heater relay board

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

Fits these brands and models

Compatible brands

Hot Spring SpasWatkins Wellness
Not sure if it fits your spa? Send us a photo — we'll confirm before you order

Common symptoms this part fixes

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

  • HH (high heat) error code on IQ2020 control panel
  • OH (overheat) error code triggering system shutdown
  • Spa heater not turning on or failing to reach set temperature
  • Heater cycles on and off erratically
  • Spa locks out of heating mode and will not reset
  • Control panel showing heater fault with no apparent cause

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

Before you buy — quick checklist

  • Confirm your spa uses the IQ2020 control system — check the main circuit board or owner's manual
  • Verify the part number 77118 on your existing relay board before ordering
  • Rule out a failed high-limit sensor or pressure switch as the root cause of HH/OH codes before replacing the board
  • Inspect wiring harness connectors for corrosion or burn marks — a damaged harness can cause repeat board failure
  • Check that your spa's heater element itself is not failed or shorted before installing the new board

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

Install difficulty: Hard — Technician recommendedTypically 60-90 minutes

Warranty

1 year manufacturer 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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