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Sean
Sean, HVAC Technician
Category: HVAC
Satisfied Customers: 220
Experience:  Owner HVAC company
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I have a m1 blue and m2 red and I need to plug it into

Customer Question

I have a m1 blue and m2 red and I need to plug it into universal board and the slots that are available are hum, Ind, cont, and eac
Submitted: 1 year ago.
Category: HVAC
Expert:  BillyHvac replied 1 year ago.

Hello,

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 1 year ago.

M1 and M2 are unused blower wires. They just need a dummy terminal to put on. It can M1 and M2...it could be terminals labeled PARK...

Do you have park terminals? or what board do you have?

Customer: replied 1 year ago.
No park terminal I have a hum, cont, Ind, and eac. I have a universal arcoaire board made by Honeywell
Customer: replied 1 year ago.
Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Live Phone Call. Let me know if you need more information, or send me the service offer(s) so we can proceed.
Customer: replied 1 year ago.
I still need more information on this please ASAP
Expert:  BillyHvac replied 1 year ago.

hum = humidifier

cont = continuous fan

IND = inducer

EAC = electric air cleaner

Give me model number of the board and I can tell you where they go...but these are extra wires and can just be taped off and not put on board at all.

Expert:  BillyHvac replied 1 year ago.

M1

M2

M2

Park

Unused

all of those are dummy terminals just for a place to put unused wires.

Customer: replied 1 year ago.
The model number is *****
Expert:  BillyHvac replied 1 year ago.

What is number of board you used?

Expert:  BillyHvac replied 1 year ago.

Honeywell st9120?

Customer: replied 1 year ago.
No it's st9160
Customer: replied 1 year ago.
I'm using a st9120u
Expert:  BillyHvac replied 1 year ago.

ok...so you should have terminals labeled "unused motor wires"

see here

Customer: replied 1 year ago.
I'm using a st9120u board
Expert:  BillyHvac replied 1 year ago.

Yes...see previous response with this link HERE

Customer: replied 1 year ago.
I need to know where m1 blue and m2 red go on st9120u board
Customer: replied 1 year ago.
The old board is a st9160b1084
Expert:  BillyHvac replied 1 year ago.

I just showed you.

Dont you have the unused terminals I showed in picture?

Customer: replied 1 year ago.
No this one doesn't have the unusual terminals
Expert:  BillyHvac replied 1 year ago.

Is this your board shown here

Customer: replied 1 year ago.
M1 and m2 off old board converts to what on a st9120u board.
Expert:  BillyHvac replied 1 year ago.

They go to terminals "unused"..just like the manual says..click the blue word below

CLICK HERE

If you still do not understand I want you to take a pic of your board..or write down for me every terminal available

Customer: replied 1 year ago.
I need to know where m1 and m2 off a st9160b1084 goes on a st9120u board
Expert:  BillyHvac replied 1 year ago.

Are you getting my replies?

I sent 2 pictures direct from the st9120u manual.

Just tell me ALL the terminals you have open on the board...

BUT you dont even need them...M1 and M2 are leftover wires...They only plug onto terminals for somewhere to keep them.

You can leave M1 and M2 totally unhooked from board and taped off and it is the same thing...these wires are not used.

Customer: replied 1 year ago.
Now with the new board hooked up the fan now works but the burner's are not trying to fire
Expert:  BillyHvac replied 1 year ago.

did you cross the wires to new terminals as described in the chart I sent?

Customer: replied 1 year ago.
Which wires
Customer: replied 1 year ago.
Can you please send me one now I really need my furnace I have lil one's
Customer: replied 1 year ago.
What does it mean when the green light is flashing on the board and it's still not firing up but the blower kicks in?
Expert:  Sean replied 1 year ago.

Are you still needing assistance?

Customer: replied 1 year ago.
please
Customer: replied 1 year ago.
It's not calling for fire
Customer: replied 1 year ago.
Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Live Phone Call. Let me know if you need more information, or send me the service offer(s) so we can proceed.
Customer: replied 1 year ago.
My board isn't sending a signal to call for fire
Customer: replied 1 year ago.
Can I get some help here please
Expert:  Sean replied 1 year ago.
I opted out last night because I was available, I can help for aittle bit now if your on?