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: 22518
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

Getting a motherboard error - steady blinking light. Error

Customer Question

Getting a motherboard error - steady blinking light. Error says it is a line polarity reversal. Is this a motherboard problem or something else like a transformer?
JA: How old is the appliance? Have you gotten error messages before?
Customer: Mfg = 04/2003. No messages before.
JA: Do you plan on doing the work yourself?
Customer: yes, I am quite good at electrical and mechanical things and have repaired other personal (home) furnaces.
JA: Anything else we should know to help you best?
Customer: Just trying to figure where the error code points to a problem. I figure it's a bad motherboard, but need advice if I should look elsewhere.
Submitted: 9 months ago.
Category: HVAC
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.

I am very sorry for the delay.

Do you still need assistance? I am very familiar with this code and board

Customer: replied 9 months ago.
still need assistance. It is a Bryant model 310AAV036070 furnace. Motherboard has a steady blinking light which the code says is related to a polarity reversal in the line. Is this a bad board issue or some other problem?
Expert:  BillyHvac replied 9 months ago.

If you have not done any wiring to the furnace it is a bad circuit board.

The basically does not recognize the power as correct now.

The only fix is to replace the board

Customer: replied 9 months ago.
Thanks! I'll probably replace the igniter at the same time just because the furnace is getting older.
Expert:  BillyHvac replied 9 months ago.

Not a bad least keep one handy.

If you have an issue just return here...after you rate service you have 30 days of follow up