Pentair Mastertemp 400 Pool Heater - Service Heater Light On - EASY Fix

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Step by Step Guide on a few simple items to Troubleshoot the Service Heater Light on a Pentair Mastertemp 400 Pool Heater.

Multimeter: https://amzn.to/41OWHBV
OEM Exhaust Sensor: https://amzn.to/3DTxm0D
Aftermarket Exhaust Sensor: https://amzn.to/425RfcL



Intro: 0:00
Troubleshoot: 0:27
Test Exhaust Sensor 1:25
Replace Sensor 2:25
Test New Sensor 3:54
Category
Water Heater Repair
Tags
dad does it all, pool, heater
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