Endless Summer Pool & Spa - Recent Questions, Troubleshooting & Support

I would change the thermocouple and here is why:

The thermocouple is the pilot's, well, co-pilot! It is the electronic device that senses if the pilot flame is hot enough to sustain burning the gas fuel from the burner. If the thermocouple thinks it's safe, then it keeps open the main gas valve located in the pilot assembly. If the thermocouple does not sense enough heat from the pilot flame (such as when the pilot is out), then the thermocouple shuts off the gas valve to the burners.
How the Thermocouple Works
So what is this thing and how does it work? Well the thermocouple (technically called a thermocouple junction) is a device that contains two metal wires welded at the ends and placed inside a protective metal case. The thermocouple sensor is found at the business end of the pilot flame and is designed to be placed in the hottest part of the flame. The other end is connected to the pilot valve body. As the thermocouple heats up, it produces a small amount of electricity and when it gets hot enough from the pilot, send a signal to open the gas valve by using a solenoid operated by a 24 volt transformer. The thermocouple calls the shots, and by converting heat to an electrical signal, it allows the gas valve to open or close. Once the gas valve is open, gas is then constantly supplied to the pilot and as required for the gas burners (as called for by the thermostat). If the pilot goes out, then the thermocouple gets cold and produces no electric signal to open the gas valve's solenoid and the gas valve shuts off the gas supply to the pilot and burners

Turn off all power to the hot tub as soon as you realize it is overheating. The spa should have an automatic shut off when the water temperature reaches about 112 degrees fahrenheit. Call your hot tub dealer or manufacturer for service options. There are a variety of conditions that could lead to the overheating of your hot tub, but may differ in various hot tub models and brands. Check the water level of the hot tub. Low water levels could be the culprit for the over heating, so you may just need to add more water to the hot tub.Check the shut-off valves in the hot tub. If they are closed while the hot tub heater is on, it could cause the water to reach unsafe temperatures.Clean the hot tub filter. A dirty filter could be blocking the flow of water, causing the water to sit in the hot tub and overheat.Turn the power back on after finding the problem and talking to the hot tub dealer. The hot tub will probably not start back up until the water reaches a safe temperature

If you nothing is coming through and you have a full cylinder first check the regulator is working OK, just take the hose off and turn the cylinder on for 2 seconds (do not light it). Next check the fuel pipe is clear, if OK check for a leak, to do a leakage test see patio heater problem solving page. If that is OK check you have a spark and the lead is not shorting out. If the pilots lights but goes out then try changing the thermocouple.

Check what type of fuel, if using butane on cold days it will stuggle to stay alight, always use propane on outdoor patio heaters, propane will work in vvery low temperatures. If using propane check for leaks, do a leakage test, found this patio heater specialist site very useful.

Generally this is caused bu a worn thermocouple, these last form 2 years up to 6 years but will wear out at some point. For help see patio heater problem solving, these patio heater specialist have helped me in the past.

If you are running on butane try switching to propane, on cold nights butane will slow down and go out. If using propane then the first consumable item that fails on a patio heater is a Thermcouple, this will cause the pilot to go out if worn. Found this site very useful with lots of Patio Heater Problem pages.

Hi and welcome to FixYa. I am Kelly

A few things to do here.
1. Make sure the thermocouple probe is positioned directly inside the pilot flame.
2. Disconnect the thermocouple from the gas valve and clean the blunt end of the thermocouple AND the area in the gas valve that the thermocouple blunt end mates to. Any dirt, debris or corrosion in this area will cause the symptom that you describe
3. Worst case if you do not have a blue pilot flame you may have to remove the pilot orifice and clear the pin hole in the orifice.
4. If you have a push and hold type pilot lite gas button... press hard... and let go several times.
5. After all of the above the symptom is still present.... you will have to replace the thermocouple.
I read that you already did the burner tube cleaning.

Most of the time this symptom is caused by the thermocouple either being in the wrong position, a defective thermocouple or a dirty connection surface area where it mates to the gas valve.

Thanks for choosing FixYa,
Kelly

I would have suggested the same thing. It may not be cleaning it needs. If the thermocouple has failed, then it needs to be replaced. I sure would start by giving it all a good cleaning though.
Farmerbear at FixYa.com

Sounds like you need to replace the thermal couple in the unit.

The temp sensor that is in position for the pilot light to heat up is not sending a signal to open up the gas valve to the burners. What you can try is to clean this probe that sticks in the pilot flame. This piece that I am referring to is a thermcouple. What I use is alcohol scotchbrite and cotton balls. Gently scuff the thermocouple with the scotchbrite and then wipe clean with alcohol and cotton balls. This should fix the problem if not you will need a new thermocouple.

Question edited for clarity. Question moved from Computers category. Yes if you swap everything that is connected to electricity over to 220 volts. It is marketed as a 110 volt spa eliminating the problems of running 220 volt power. https://www.google.com/search?q=lifesmart+ls350+plus+220+volt ..

Contact the manufacturer 1 800 863 3930 for specific information about this. The manual does not include information for getting rid of a general fault. https://www.alpha.com/download/outside_plant_power/cableups_power_supplies/broadband_ferro/install_oper_manual.pdf