XMK 6600-166 Temperature Sensor for Sundance Spas and Jacuzzi Hot Tubs, with Curled Finger Connectors and 6540-228 O-Ring

Fixed my temperature problem where it said it was hot but was only warm.

Fit great in my 2003 Hermosa Del sol. So far its working. The spa is still warming up from 65. Tested water with a thermometer and is reading true. Will update if it fails or stops working.

Worked perfectly on a Jacuzzi J-315 and the temperature appears to be accurate. Priced really well and felt/looked like a quality product.Not a fan of the o-ring that came with it because it distorts even when hand tight so just to be safe, I added some silicone.The wires fit into my existing connector exactly as they should but you have to use a small screwdriver to get the old ones out. This is the case with any of these unless you spliced it in.

Fit perfectly and was very easy to replace. Rather than try to pull the fiddly connector off the green board, I cut and spliced the new wire to the old inside the control box. The o ring provided didn't completely cover the hub of the sensor so I reused the old one. I think the spa repairmen get about two hundred bucks these days just to step out of their truck, so this saved me significant money. Even if this sensor only lasts a few years, it's OK. It's a cheap, easy repair.

works great, the connector was different so i just spliced it. checked the water temp to verify its accuracy,exact match. very easy to install and would recommend it to anyone looking to replace there's.

I thought my motherboard was kaputz then learned that the temp sensor could be failing causing the spa to shut down when it gets too hot.Sure enough- my temp setting was 98 deg but when I tested the water, it was 107 deg. A few tips-1. Be sure to buy the sensor with the correct connector (where it plugs into the motherboard...there are a few styles so see whatchya got b/f buying).2. I saw that you can swap this out w/o draining the spa but I didn't have tubing that would slide over the 1/2" pvc tubing the sensor wire runs in. So I drained the spa to below the sensor.3. No need to run fish tape. Unscrew the failed sensor, pull the old one out about 6" and cut it off. Tape the new leads to the wire you just detached the sensor from and Viola! Instant fish tape to pull the new lead through the tubing.As always, secure the power to the spa when doing this. Hope this helps.

This product was missing the o-ring (it was advertised to include it), the whole point of ordering it online is so I wouldnt have to go to brick and mortar. I still have to now go to Ace to get an o-ring.

Works great and much cheaper than brand name.