How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask BillyHvac Your Own Question
BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 22515
Experience:  Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
Type Your HVAC Question Here...
BillyHvac is online now
A new question is answered every 9 seconds

BillyHvac. I have a Waterfurnace E Series. The red fault

Customer Question

Hi BillyHvac. I have a Waterfurnace E Series. The red fault light labeled "Air Flow" is lit up. When the furnace starts, the blower spins a few seconds for a few times and then stops. After that the fault light comes on. Any suggestions about how to diagnose and repair?
Submitted: 9 months ago.
Category: HVAC
Customer: replied 9 months ago.
When the fan motor starts it seems to "studder" - spinning both forward and backward. It mostly spins forward, but will reverse itself.
Expert:  BillyHvac replied 9 months ago.


My name is ***** ***** I will do my best to assist you. I am looking over your question now and will respond shortly.

Expert:  BillyHvac replied 9 months ago.

99% chance that you have a bad module on the rear of the motor.

This module can be replaced with the correct part.

You can remove the module from the rear of the motor and inspect...but I can tell you from experience that 99 out of 100 is the module.