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BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 21993
Experience:  Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
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I have a Bryant Evolution 95i Plus furnace and the Evolution

Customer Question

I have a Bryant Evolution 95i Plus furnace and the Evolution Control. On the furnace is a Aprilaire humidifier. The control doesn't call for the humidifier, as last year I don't think it came on at all. I have notice the outside temperature is 185 degrees. I know there seems to be some type of sensor outside by the a/c unit. In an attempt to see if this is causing the humidifier not to kick on, can I replace the outside sensor? I'm trying to trouble shoot to see if my controller is bad. I know the outside temperature and outside humidity levels are part of what makes the humidifier come on.
Submitted: 6 years ago.
Category: HVAC
Expert:  BillyHvac replied 6 years ago.

You are correct, if the sensor reads, if mistakenly a high temp outside this will impede operation of the humidifier.


Replace sensor.

Customer: replied 6 years ago.
What is the part number or how can I get this sensor?
Expert:  BillyHvac replied 6 years ago.
Just a moment and I pull part number.
Expert:  BillyHvac replied 6 years ago.

Link for part number and information only. Feel free to shop around or order locally


Customer: replied 6 years ago.
Whether the Evolution Controller is Bryant doesn't make a difference, or they all pretty much the same. All I would do is cut off the old one and put on the new one?
Expert:  BillyHvac replied 6 years ago.
You are correct. It is just a matter of input to the evolution controller. You will most likely have a pair of wire nuts you can undo and replace. Or if more convenient cut and splice. Also many are now putting it in the furnace inake pipe by drilling a small 1/4" hole and inserting in the pipe. This keeps the control inside yet sampling outdoor air as it is brought into the intake pipe
Customer: replied 6 years ago.
Lastly, if this does not solve my humidifier problem, is the next step to have someone look at the Evolution Controller, which is still under warranty?
Expert:  BillyHvac replied 6 years ago.
That would be correct. You already know by bypassing that it is a breach in the control circuit. Once sensor is replaced the last option for fault is the controller not energizing the humidifier contacts
BillyHvac and other HVAC Specialists are ready to help you
Customer: replied 6 years ago.
Thanks for your help
Expert:  BillyHvac replied 6 years ago.
You are very welcome and I wish you a pleasant holiday season

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