Trex

FWIW optical sensor "sees" if the heater is flooded so it is safe to turn the heater on. Happy dayz, new heater fixed my problem, whether it was the temp sensor or the element I may never know... Now I get to spa for the holidays 🙂

Thank you for your responses. No pressure switch, only optic and temp in heater. There are heaps of spa power (by davey)with the Sp400P circuit board controller and running the Sp400 heater on the market, very popular with the retrofit, which mine has making redundant the OEM Hotsprings control panel. Spa was running fine till I left the circ/heat on 36deg C over night by accident. Me thinks I an missing something like a manual reset in the heater but I destroyed it trying to disassemble it. Have new heater en route.

Hot springs, model unknkwn Davey Spa power touch pad Davey Spa power SP400P controller Davey Spa power SP400 1.5kw heater Now that I have the reset procedure correct it runs for a minute then display goes crazy, with alarm and auto led flash, turn it off and back on again shows error 8 with heater led flashing, tried to pull the heater apart but no luck, have ordered new heater.

Think I may have had a bum steer on the reset, just read I need to push the up/down and jet1 button simultaneously.

Error code 5 Heater related, anything from circ pump not flowing (pulled it out and plugged it straight into 240 and worked) to optical sensor, as per the manual, pressing up and down button does not reset the panel. Spa is currently 30deg C I'm thinking I can rule out the circ pump now, so looking st the optical sensor now, but it is my first spa and my first problem with it after weeks of play. Heater light is blinking red...

Doing some more research it may well be the circulation pump failed

Hi all and thank you for accepting me here. I left my spa on heat with the circulation pump and when I discovered it the next day the spa power controller is showing er 5 which does not clear via the cool off and reset. I'm thinking the next avenue will be the temp sensor in the SP400 heater. Have I missed anything or will I be up for a temp sensor replacement?