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I am getting 17volts out from the low voltage part of the

Customer Question
control board JA: I'll do all...
I am getting 17volts out from the low voltage part of the control board
JA: I'll do all I can to help. How long have you been dealing with this?
Customer: I changed the capacitor and contactor on the outside unit on Friday
JA: Did you double-check the thermostat? And what about the unit's filters?
Customer: The main problem is that the outside unit does not turn off now
JA: Do you plan on doing the work yourself?
Customer: yes
JA: Anything else we should know to help you best?
Customer: I have a Nest thermostats, Trane boiler and a Goodman condenser unit.
Submitted: 1 year ago.Category: HVAC
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Answered in 2 minutes by:
8/22/2016
HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 1 year ago
BillyHvac
BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 22,888
Experience: Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
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Hello,

My name is Billy.

Is the 17 v measured off the wires while hooked to the board or off?

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Customer reply replied 1 year ago
While hooked to the board
HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 1 year ago

Can you measure the wires unhooked to see if something is draining or if the input is low?

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HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 1 year ago

From the transformer

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Customer reply replied 1 year ago
I am getting 24v on the transformer but 17 from the board
HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 1 year ago

Thank you.

What if you remove the contactor wires outside..do you get 24v going to the contactor?

Also if you turn furnace disconnect off does contactor remain down

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Customer reply replied 1 year ago
I am getting 17v at the contractor
HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 1 year ago

Ok, is this an ac or heat pump?

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Customer reply replied 1 year ago
Ac
HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 1 year ago

if you unhook the 2 wire from the unit that comes from inside...do you read 24v unhooked?

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HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 1 year ago

unit = ac unit

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Customer reply replied 1 year ago
The two wires unhooked are reading 17v, I can't understand why I am getting on 17v from the board
HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 1 year ago

Ok, so with thermostat wires on board (r,g,y,w) unhooked...what do you have terminal R to C?

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Phil
Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6,938
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