Question about Pentair PUREX MINIMAX HEATER; THERMOSTAT, 60 CAPILLARY - 072022
The Propane heater was installed sometime in the late 90's. It is believed that unit is 400,000 BTU. The operation and installation booklet is labeled "MiniMax Plus, MiniMax XL and PowerMax. The first time I used it after about 3 years of non use, it operated OK and reached 105 degrees in about 45 minutes. FYI - The spa contains about 5,000 lbs of water. I am quite handy and could repair myself with some guidance. Is there a repair service available in the Ormond Beach, FL area?
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Posted on Jan 02, 2017
hello, It sounds like you may not be getting circulation thru the heater. Make sure the valves are open to allow water to pass thru the heating system. Some systems use a bypass on the heater so there is not a lot of wear on the coil system in the heater. If it is not circulating it will get too hot and the safety shut down will occure. If you are getting water circulating thru the heater, then the thermocouple or auto start igniter system is not working correctly. It is trying to start and can't then recycles. If the burners are igniting on the startup and then shutting back down you may have a bad control unit or thermal sensor unit. Since the unit is gas have a professional service it for you. Good Luck, RAC
Posted on Apr 20, 2009
The service manual for your heater can be found here:
This should help in determining the problem and steps to resolve.
Posted on Aug 22, 2009
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.
Posted on Dec 03, 2009
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