Bob Sanders

The pressure switch is stuck in the closed position (on). When there is no circulation (pump off) the switch is SUPPOSED to be open (off). This is a safety device that disables the heater if flow is lost. The board has locked out your automatic operations because it has sensed the pressure switch malfunctioning. You should be able to confirm this easily enough by disconnecting one of the pressure switch wires while the tub is in standby. The FL2 code SHOULD go away (Don't start the jets while the wire is disconnected.... you'll get a different error code). Replace the switch and you should be back in business. In the mean time, don't leave the tub unattended while running it. With the pressure switch stuck closed the heater can now operate under a no-flow condition.... which can ultimately cause some serious damage.

Thanks for the info Chem geek. Yes, I understand copper isn't a pure answer on its own. In fact where I live (Canada) it's against health regulations to run a hot tub without SOME bromine or chlorine involved. At present I'm using bromine which seems to work but if you use the tub as much as I do (3... maybe even 4 times a day, 7 days a week)then it does become slightly irritating to the skin. So, I'm just tooling around looking for alternatives to minimize bromine/chlorine levels. I do have an ozonator in shipment right now... should be here on Friday. There does seem to be some benefit from ozone, provided you run it 24/7 (and I do have a smaller 24/7 pump for heat and filtration) and I also checked in on salt water systems. I'm seriously considering the in-line Chlormaker. The more I read on salt water systems the more impressed I am. A bit of conflicting info on them however.... some say ozone and chlorine don't play well together and other say quite the opposite.

Interesting thread.... maybe I'll drop my 2 cents for what it's worth. I looked up the mirage on the net and the one I saw only had a 3Kw heater.... not very big, at least when you consider a good quality hair dryer is 1.5Kw and a cool wind is a killer for stealing heat. Small bodies of water lose heat fast in the wind and that's just a fact of life. But it's not just the wind either. If your jets are getting fresh outdoor unheated air there will be a further loss there. I live in Canada with an 1100 gallon tub and a 4500watt heater and I have to heat the air for the jets and blubbers. Wind will also get under the tub through the panels if they're not put on properly.... and that's more heat loss... even with the insulation. If it's any consolation however... in the Winter weather you won't see TOO much of the higher winds, and if you do.... you won't be in the tub!

Has anybody actually tried this stuff and have anything to report on it? I'm new at the hot tub game (using Bromine) and am tempted to give it a try. I know that copper works... I've seen that with my own eyes. I had a terrible problem with mold/algae growth on the shady side of my cottage roof and a roofer told me to droop a bare copper wire across the roof near the peak. Sure enough.... it not only killed the existing growth but I haven't had a problem since. What concerns me is the low calcium level required by the system. It basically calls for soft water which I was told would cause foaming issues when the jest are running. Can any one comment on this? Thanks.