Mastertemp Fires for 10-30 seconds then shuts off

[sdaniel105]

I have a Pentair Mastertemp 125 heater that I’ve for 2 seasons. It starts fires up, runs for 10-30 seconds and then quits, no codes.

Checked gas pressure. Replaced high limit and high temp sensors, flame detector and igniter and still doing same thing.

Even control board this morning

Any suggestions?

Thanks.

 

[ajw22]

Welcome to TFP.

Does your heater have a 5 button keypad or a 6 button keypad?

What is the resistance of the igniter?

Where is the flame detector you replaced?

Do you have any signs of rodents in the heater?

Is there any corrosion in the heater?

Show us pics of the interior of the heater.

Lots of information in…

Heater Flame Sensing - Further Reading

www.troublefreepool.com

Pentair MasterTemp Heaters - Further Reading

www.troublefreepool.com

 

[1poolman1]

I have a Pentair Mastertemp 125 heater that I’ve for 2 seasons. It starts fires up, runs for 10-30 seconds and then quits, no codes.

Checked gas pressure. Replaced high limit and high temp sensors, flame detector and igniter and still doing same thing.

Even control board this morning

Any suggestions?

Thanks.

Check all of the ground wires (green wires) for good connection, no rust/corrosion where they attach to the cabinet.