Smart low-flo heater assembly compatible replacement for Sundance Spas 850 and 880 series from 2000 to current. The Smart heater includes the high limit disc and red and black wire to connect it to the circuit board. The high limit probe is not included with this heater. It is a bullet-style sensor probe that installs into the drywell at the bottom of the heater. In the older style heaters this is silicone and can be removed. If you have a original heater older than April 2007 then you will also have to order a new high limit sensor Part# 6600-168
Call the store requesting if the part could ship ASAP, heater failed in -13 weather. The person I spoke with said he'd look for my order.
within 1hr of my order being placed, I got confirmation a shipping label was created, and it was shipped out that evening. Arrived at my door the next day.
Awesome experience.