🚀 New launch promo — 10% off orders over $300. Use code LAUNCH10
Bubbles Supply
Not sure which part you need? Upload a photo and we'll find it. →
24" Single Pole Hi-Limit Sensor 275-3275-00 - Bubbles Supply

24" Single Pole Hi-Limit Sensor 275-3275-00

Part #: 275-3275-00

$50.17
In stock — ships today
Qty
🔒 Secure checkout↩️ 30-day returns✅ 1-year warranty
Add to B2B order list

Not sure this fits?

Send us a photo of your old part — we'll confirm the right replacement before you order.

Upload a Photo
1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this sensor

This Robertshaw 24" Single Pole Hi-Limit Sensor (275-3275-00) is a critical safety component designed for spa and hot tub heating systems. The sensor features a 24-inch capillary tube with a 5/16-inch sensing bulb, engineered to automatically shut off power when water temperatures exceed safe operating limits. This OEM-quality replacement part helps resolve common spa issues including overheating errors, freeze protection malfunctions, and heating system failures.

Built to Robertshaw's exacting standards, this hi-limit sensor delivers reliable temperature monitoring and system protection. At Bubbles Supply, we guarantee an exact fit for your spa's control system and offer same-day shipping to get your hot tub running safely again. Every sensor includes our comprehensive 1-year warranty for complete peace of mind. Always verify capillary length and bulb dimensions match your existing sensor before installation, and ensure proper electrical connections are secure.

Exact part number

275-3275-00

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • capillary hi-limit
  • hi-limit switch
  • high limit sensor
  • single pole high limit
  • spa safety sensor

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:

  • Spa throwing HH (high heat) error code and shutting down
  • Heater won't fire — control board showing OH fault
  • Spa not responding to freeze protection — ICE error on display
  • Heater cycling off prematurely at normal operating temps
  • Spa locked out and requiring manual reset after overtemp event
  • Control system failing to detect water temperature correctly

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

Before you buy — quick checklist

  • Measure your existing capillary tube length — this sensor is 24 inches; too short or too long won't seat correctly
  • Confirm your existing sensor has a 5/16-inch sensing bulb diameter before ordering
  • Verify your control system uses a single-pole hi-limit configuration, not dual-pole
  • Check the OEM part number printed on your old sensor or control system documentation
  • Inspect the capillary tube routing in your equipment bay — a kinked or damaged tube can cause the same fault codes as a failed sensor

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

Install difficulty: Medium — Some experience neededTypically 30–45 minutes

What's in the box

  • 24" single pole hi-limit sensor (275-3275-00)
  • Capillary tube with 5/16" sensing bulb

If your order is missing any items listed above, contact hello@bubblessupply.com within 48 hours of delivery.

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.

🔒 Secure checkout · SSL encrypted·🇺🇸🇨🇦 Serving the US and Canada·↩️ 30-day hassle-free returns·📦 Same-day fulfillment