Gecko Hi Limit Sensor – Y Series
Genuine Gecko replacement sensor — Gecko part number 34-0203Y-36-K.
Specifications
- Sensor Application: Spa Control
- Sensor Type: Temp and Hi Limit
- Application: Gecko, HydroQuip
- Model: Y-Series
- Connector Type: 4 pin
- Sensor Diameter: 1/4″ & 1/4″
- Wire Count: 4 wire
- Wire Length: 36″
*Manufacturer reserves the right to make production changes. Actual product received may vary slightly in appearance but the function remains the same.
✅ Not Sure It Fits? Verify Before Ordering
Hot tub part compatibility can vary by spa brand, model, year, serial number, control system, and part revision.
To help us identify the correct replacement part, please send clear photos of:
- Your existing part label or sticker
- Your spa serial number sticker
- The equipment area or installation location (if accessible)
EZ Hot Tub Parts can help confirm fitment before you order and help reduce costly returns.
Match the Gecko part number 34-0203Y-36-K on the label of the part you are replacing (or your spa pack label). If you cannot find it, send us photos through the fit-check form above and we will confirm before you order.
Orders ship from our parts warehouse partners, and orders over $99 ship free in the lower 48. Need it confirmed before you order? Use the fit-check form above.
34-0203Y-36-K 340203Y36K 59-355-1225 gecko gecko hi limit sensor – y series





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