Pentair Mastertemp 400 leak

crashxx

Gold Supporter
Jan 11, 2016
85
Oklahoma
I have a Pentair Mastertemp 400 that's leaking. It looked like the water manifold was leaking so I replaced all the O rings. Now I have water dripping out of the white plastic air inlet. Can anyone tell me what I need to do to fix this? Thank you all and Merry Christmas to everyone!
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
33,361
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
The heat exchanger is probably corroded.

All the water is sealed in the heat exchanger. Any water internal in the burner can is likely a heat exchanger leak.

Pentair_MasterTemp_400_operating_pic.png


Pentair MasterTemp Heat Exchanger.jpg
 

crashxx

Gold Supporter
Jan 11, 2016
85
Oklahoma
I use bleach, injected into the return with a pump down stream from all equipment. We have an automatic cover so the pool always stays closed. I generally keep the chlorine levels low, or at least I thought I did.
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
47,173
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
The exchanger is typically half or more the cost of a new heater. So a new heater would be a better choice.
 

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ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
33,361
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
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