I had the same problem last year, I talked to a spa guy and he stated that the temp sensor was probably covered in bio crud. He also stated that the tub should be cleaned with a hot tub flush. After doing that I have not had a problem with the temp settings.
SOURCE: Heater will only heat spa water to luke warm.
the water in my arctic spa hot tub took 2 weeks to get to 102 should it take that long ?
SOURCE: my dream maker spa does not work. there is
open control panel will see a small glass fuse replace if blown if 220 volt check that getting power on both lines
SOURCE: E04 message on MiniMax NT 400 DV..Help!!
Your EO4 message tells you you have a fan problem. So ether your fan is diying wich you would hear or you have a bad presure sensor in your exaust. A new fan is a little pricey but the sensor is reasonable for heater parts. I can't be sure but I believe it ether screws onto or into your exaust and it just plugs on to your control board. If your sensor is going bad their is a reason and this should be addressed. It should be in your by-pass or your gas pressure. But as far as a new heater, not untill you have water coming from the cabnit. It is sometimes easer to sell new than keep up with new, Good luck let me know how you do.
SOURCE: the heater starts and runs and heats, but on the
Thank you for posting your question here on Fixya.com.
The part you will need is called a thermistor; it is the part that reads water temp and converts it to a digital signal for the board to display. The part number should be 42001-0053S. If you need additional details or troubleshooting tips, try the owner’s manual, here. You should be sure that there is no potential problems with water flow prior to just replacing the part. In extreme cases you could have poor water flow and the water in the heater is way too hot (105) yet the pool is much cooler. Generally you will have other indications this is the problem, such as a lot of banging and popping, like making microwave e popcorn. If that’s not the case, the thermistor is the way to go
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John
SOURCE: I have a Jandy Lite
This sounds very much like spider webs in the gas orfaces. If you shut the power off and remove the wires to the gas valve then shut the gas down and remove the fed pipe from the gas valve you should be able to pull the burner tray out of the heater. Now if you remove the burners you should be able to remove the brass orfaces connected to the main gas feed pipe. If you use an air hose or a can of compressed air you can blow this out now. Now take the orfaces you removed and clean them with a tooth pick or a small piece of wire. The webs will look like small cotton balls or lint. They don't stop the gas they just slow it or disperse it and keep it from firing clean and evenly.
At this point you can reassemble the tray and install. This should fix your problem.
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Mine is reading the tempature correctly on the display. Did yours also display the tempature correctly?
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