I have a 4 year old Coleman Cooperage 106 with 2 pumps (2 speeds). The tub is in great shape and is very clean….always maintained and used maybe a few times a month. I have been noticing that Pump #1 (which is only 2 years old) has been coming on for "1 minute" (at low-cleaning/filtering speed) every 5 or so minutes. “filtering on for 1 minute…then off for 5 minutes………on for one minute…….then off for 5 minutes”. It does this for hours at a time. I assume that it stops at some point, but I usually go reset the tub when this happens.

**Also, not sure if this is related, but a month or so back, the spa was indicating overheat “OH” on the control panel and shutting the spa off maybe once a week. The spa water is not overheating and the pumps and flow were clean as can be.

The only thing I can think of is that it’s the Balboa circuit board (part #51666) or the hi limit sensor is bad? Originally, I thought maybe the motor was overheating after going through the repetitive on and off cycling……….causing it to overheat and turn off. However, the spa is outside (in Northern MI) and goes through it’s 3 hour filter cycle fine (without overheating) after I’ve reset it. Maybe it is doing this during it’s scheduled daily 3 hours filtering cycle – not sure? I’d have to keep a watch on it and track the time.

Can anyone help me figure out why the spa filter system is running "on and off" once in awhile (maybe once a week)? Dealer thought the pump is overheating and then shutting down via overheat limiter - doesn't make sense to me....since it can go 3 hours non-stop when going through it's daily filtering.

Could the freeze protection mechanism be failing?....the brochure states this model has "Duel Freeze Protection". Could this be coming on - circulating the water as prevention. I've opened the cabinet many times and it is insulated well and very warm inside. Or a bad sensor?

Thank You.