Question about Pentair Mastertemp Pool & Spa Heater Dual Electronic Ignition 400,000 Btu Lonox Propane 460737
I heated my pool yesterday and got the temperature up to 80 from 62. Today I turned on the pool and heater to get temp back to 80 and the heater lights on display are flashing on and off and the service light is on
I just had the same problem resolved, my mastertemp 400 would run up the temp to 82F and then cutoff, the service light flashes and then 50 seconds later the heater would restart and run for 2 minnutesbefore shutting down again and relighting in 50 seconds. Repeating until the temp setting is reached.
I had the pool guy out 3 times until he found a bad thermal regulator valve (kit #77707-0010). Once replaced the heater runs great.
He told me that it's my pool chemestry that is to blame, I had it checked (like I do weekely by me and monthly by the pool supply store) and it perfect??? I'm now questioning what caused the corroson and stop it from coming back?
I hope tis helps.
Posted on Feb 06, 2009
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Mar 31, 2017 | Pool & Spa
Jun 09, 2015 | Hayward 116k BTU HeatPro Digital Heat Pump...
Oct 09, 2014 | Jandy Laars Lt 250,000 Btu Heater
May 09, 2014 | Jandy Lite 2 Natural Gas Pilot Light...
Jan 10, 2014 | Sta Rite SR400LP Max E Therm Pool Spa...
Aug 18, 2013 | Rheem 266K to 399K BTU Swimming Pool...
Jul 09, 2011 | Raypak Rp2100 Pool & Spa Heater Lonox 407k...
May 21, 2011 | Pentair Minimax NT Heater
911 people viewed this question
Usually answered in minutes!