PENTAIR MASTERTEMP 400 POOL/SPA HEATER AFS AIR FLOW SWITCH ERROR LIGHT REPAIR

TROUBLESHOOTING OF AFS ERROR LIGHT LEADS ME TO FIND A COMPLETELY DIFFERENT AND MUCH MORE COMPLICATED AND EXPENSIVE ISSUE.

DON'T ASSUME YOU HAVE A DEFECTIVE AFS (AIR FLOW SWITCH) IF YOU HAVE AFS ERROR LIGHT.  IT IS A VERY SIMPLE COMPONENT OF THE HEATER, SO THERE IS NOT REALLY MUCH THAT CAN GO WRONG WITH IT.  JUST TEST ITS FUNCTIONALITY FIRST BEFORE ORDERING ONE.  YOU WILL MOST LIKELY SAVE YOURSELF ABOUT $100 BY NOT REPLACING A TYPICALLY NON-DEFECTIVE PART.

MY HEAT COILS REPLACEMENT VIDEO:  Pentair Mastertemp 400 Heat Coil Tube...

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