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Goodman ARUF364216BA 5 years old; thermostat shows 63

Customer Question
Goodman ARUF364216BA 5 years...

Goodman ARUF364216BA 5 years old; thermostat shows 63 degrees but set at 75 degrees

Contractor's Assistant: Just to clarify, do you think this is a larger HVAC problem, or something specific to the thermostat?

We replaced the thermostat with no change so must be furnace

Contractor's Assistant: Do you plan on doing the work yourself?

Yes

Contractor's Assistant: Anything else we should know to help you best?

Is there a sensor that i need to clean?

Submitted: 4 months ago.Category: HVAC
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Answered in 7 minutes by:
12/29/2017
HVAC Technician: airheatman, HVAC Technician replied 4 months ago
airheatman
airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 9,024
Experience: Furnace, A/C and heat pump specialist.
Verified

Give me a bit more information.Do you also have an outdoor ac unit and if so what is model on that?Is it a heat pump? Do you have a multi meter so we can do some troubleshooting?

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Customer reply replied 4 months ago
we have an outdoor ac unit. I cant identify the model. I have a multi meter. It is a two story house. Goodman heats upstairs and first floor. radiant heat on separate thermostat for basement
HVAC Technician: airheatman, HVAC Technician replied 4 months ago

OK the reason I am asking is the air handler can be used with an air conditioner or with a heat pump.Which you have determines where we need to start troubleshooting.There should be a label on outside of that unit

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Customer reply replied 4 months ago
appears to be heating on second floor but not first floor. I will go outside and get a model number
HVAC Technician: airheatman, HVAC Technician replied 4 months ago

Standing by

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Customer reply replied 4 months ago
strange, but I cant find a model number anywhere on the central airconditioner. Energy guide sticker is useless.
HVAC Technician: airheatman, HVAC Technician replied 4 months ago

May be down near where the refrigerant pipes connect

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Customer reply replied 4 months ago
I checked where pipes connect, electrical connection, top, all sides, there is no model number that I can identify
Customer reply replied 4 months ago
thermostat is on first floor. Shows 64 degrees. set at 70. upstairs heat is coming out shows 70 degrees. forced air vents in ceiling.
Customer reply replied 4 months ago
installed new Sensi st55 wifi thermostat. Replaced Pro1. no change.
HVAC Technician: airheatman, HVAC Technician replied 4 months ago

OK do you know if the outdoor was running in heat mode before ?

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Customer reply replied 4 months ago
no
HVAC Technician: airheatman, HVAC Technician replied 4 months ago

Tell me what wires went to what terminals on original thermostat and where they are now as well as what thermostat is currently installed

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Customer reply replied 4 months ago
RH, RC, G, Y, W, C, I specified gas and cut the RH RC jumper on thermostat. Now realize the Goodman may be electric. I took a picture of the previous config. triple checked new connection to Sensi.
Customer reply replied 4 months ago
Heat continues to run on second floor only
Customer reply replied 4 months ago
this was the same problem with the pro1
HVAC Technician: airheatman, HVAC Technician replied 4 months ago

Which is connected now?Sensi?

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Customer reply replied 4 months ago
sensi wifi thermostat
Customer reply replied 4 months ago
st55
HVAC Technician: airheatman, HVAC Technician replied 4 months ago

OK is red to RH and have you changed system type to electric?

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Customer reply replied 4 months ago
one red to RH and another red to RC. I will change to electric now.
HVAC Technician: airheatman, HVAC Technician replied 4 months ago

WE should not have 2 reds under normal circunstances.Do you have a transformer added in the outdoor unit?

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HVAC Technician: airheatman, HVAC Technician replied 4 months ago

It has probably been 25 years since Goodman used a two transformer system *seperate transformer in indoor and outdoor )

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Customer reply replied 4 months ago
how can I verify seperate transformer?
HVAC Technician: airheatman, HVAC Technician replied 4 months ago

Look in the outdoor unit . See if the red control wire in outdoor unit .Tell me how many wires run between indoor unit and outdoor unit and what they connect to in outdoor unit.If there is a transformer out there you will see it when you open service panel

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Customer reply replied 4 months ago
It is all sealed so I will have to get a screwdriver and remove the panel.....need a few minutes
HVAC Technician: airheatman, HVAC Technician replied 4 months ago

5/16 nutdriver

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Customer reply replied 4 months ago
just finishing changing sensi to electric
HVAC Technician: airheatman, HVAC Technician replied 4 months ago

OK

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Customer reply replied 4 months ago
going out to check wires
Customer reply replied 4 months ago
looking inside air conditioner: Red blue yellow and yellow black purple
HVAC Technician: airheatman, HVAC Technician replied 4 months ago

Can you attach a pic or tell me where they connect?

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Customer reply replied 4 months ago
I looked in between the vents from top down. I can try to take a picture.
HVAC Technician: airheatman, HVAC Technician replied 4 months ago

You will not be able to see the actual control wires without removing panel

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Customer reply replied 4 months ago
ok I will do that now
HVAC Technician: airheatman, HVAC Technician replied 4 months ago

OK

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HVAC Technician: airheatman, HVAC Technician replied 4 months ago

We need to find where that second red is fed from.

Did you have a separate rh an rc in the very beginning?

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HVAC Technician: airheatman, HVAC Technician replied 4 months ago

What did you find in outdoor unit?

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Customer reply replied 4 months ago
here are more
HVAC Technician: airheatman, HVAC Technician replied 4 months ago

Looks like only two wires from inside (yellow and blue) and no transformer there

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Customer reply replied 4 months ago
I cut the built in jumper wire (RC RH red) in Sensi
HVAC Technician: airheatman, HVAC Technician replied 4 months ago

Not necessary.

There are only two wires from indoor yellow which comes from Y at thermostat and blue which is common from the transformer in air handler.

The only time you would use both an RC and an RH is on units with separate transformers inside and outside.

This is going to require a bit of time in tracing wires and determining what is going on.I am about to have to leave for the weekend.

Did changing thermostat to Electric seem to help?

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Customer reply replied 4 months ago
no change with electric. since I cut the jumper should I put RC and RH in same connector?
HVAC Technician: airheatman, HVAC Technician replied 4 months ago

You really should not have two reds.You need to determine where the two individual red come from.We should only have one and it should come from transformer in the air handler.

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HVAC Technician: airheatman, HVAC Technician replied 4 months ago

Since I have to leave I am going to open this to other experts.Hope you get this figured out.Happy New Year

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Customer reply replied 4 months ago
is there a trial and error method...disconnect one red and try
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