Mastertemp 300 e01 Code

[JackDaniels07]

Every year it seems like it's something. I just got around to opening the pool for the season try to fire up the heater and it's not starting at all and throwing an E01 code. I hooked up my multimeter, registering 17 or so on the 20k ohm setting (i believe I have this right - I'm no expert!). The manifold, thermister, high limit switch, and automatic gas shut-off are new. Am I looking at a new board? I'd appreciate any help on what to try next.

Thanks.

 

[ajw22]

I hooked up my multimeter, registering 17 or so on the 20k ohm setting (i believe I have this right - I'm no expert!).

What sensor are you testing?

Registering 17 ohms?

Did you disconnect the wires from the temperature sensor before testing the resistance?

Replace the thermistor again with a genuine Pentair part. Test it with your multimeter before installing.

Temperature Sensors - Further Reading

www.troublefreepool.com

Pentair MasterTemp Heaters - Further Reading

www.troublefreepool.com

 

[JackDaniels07]

What sensor are you testing?

Registering 17 ohms?

Did you disconnect the wires from the temperature sensor before testing the resistance?

Replace the thermistor again with a genuine Pentair part. Test it with your multimeter before installing.

Temperature Sensors - Further Reading

www.troublefreepool.com

Pentair MasterTemp Heaters - Further Reading

www.troublefreepool.com

Thanks for your reply.

I'm testing the sensor in the first picture (sorry for the blurry pic). I disconnected the wires prior to testing. The second picture is the reading my multimeter is registering.

 

[ajw22]

A reading of 17,000 is a temperature of 56F.

Was your pump running and water flowing through the heater when you did that measurement?

What was your water temperature?

 

[JackDaniels07]

A reading of 17,000 is a temperature of 56F.

Was your pump running and water flowing through the heater when you did that measurement?

What was your water temperature?

Sorry for the delay, got tied up this morning. I just opened the pool yesterday in upstate New York and its usually cold when I open it up. Plus my arms were freezing taking out the return plugs lol.

 

[JackDaniels07]

Quick update. I purchased a new thermistor and installed it. No joy. Last week I ordered a new board just in case a new thermistor didn't work out. It is scheduled to arrive tomorrow. I'll update again after installation.

 

[ajw22]

I hope you ordered a genuine Pentair board with the new 6 button keypad p/n 461105...

Pentair MasterTemp Heaters - Further Reading

www.troublefreepool.com

 

[JackDaniels07]

Just wanted to follow up on this. I replaced the control board and the heater fired right up and has been working without issue. Thanks ajw22 for taking the time to reply.

Take care.