Pentair Master MasterTemp 128 r=5 Code


May 8, 2020
Riverside, Ca
Now don't I feel STOOPID!

The way this was plumbed you have to step over the gas line (rigid pipe at least) to get to the Jandy Control Panel. Apparently I recently nudged the gas shut off valve to a half closed position so it was probably getting insufficient gas to ignite. At any rate, problem solved for now and something else for which to be on the watch.


Gold Supporter
TFP Guide
Jul 21, 2013
Northern NJ
Gas valve turned off a lot. And when I ask if the gas is on I always get an Of course reply. Check the gas line was going to be my next suggestion after the blower.



TFP Expert
Mar 2, 2011
Note: Normal boot up is 888, 128 and then rX where X is the software revision number.

The numbers are displayed briefly and then go to water temperature.
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