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We just had ours installed by professional HVAC company and so far, we haven't had any problems. Based on replies here, a number of people did have the same issues with it. I'll monitor how mine goes and I'll update here if anything happens.

Originally Posted by BBeerme

Should I copy and paste my post? Or you gonna do it?

Just did.

https://hvac-talk.com/vbb/threads/22...6-Pro-question

Should I copy and paste my post? Or you gonna do it?

Originally Posted by vin lashon

Post moved to AOP Res:

https://hvac-talk.com/vbb/threads/22...6-Pro-question

Originally Posted by BBeerme

The T6 did have a bunch of problems. Especially with heat pumps, which you do not have. But the T6 WiFi did not, for everything I've heard, the WiFi T6 is solid.

They might look the same, but they are two completely different stats.

Post moved to AOP Res:

https://hvac-talk.com/vbb/threads/22...6-Pro-question

Originally Posted by Deseldo

Maybe... Maybe not, but I WILL MAKE MY DISSATISFACTION KNOWN!

It would be like calling Ford to ***** about a Chevy.

Good chance you were dealing with series 4 or 5 T6's. Series 6 seems to have very few problems; I haven't had a single problem.

Look on the back where the model number is. The last digit is side ways. That's the series number.

Originally Posted by vkblue

So last fall we installed 255 T6 Pro Smarts (wifis) at an apartment complex. Since January, we have had some 15-20 failures where the screen goes blank. Of course, this all happens in onesy-twosies. Tried tech support through Honeywell and got "I have _never_ heard of this problem" from the help desk. Decided they were no help and went back to my distributor who talked with his Resideo rep and was told "just do a warranty replacement".

I tried putting the faulty stats on our home system (which has a T4), and the system came on, but screen was blank. So after about the 10th failure, I decided to do a little rocket surgery. Pulled the plastic cover off a broken one and a new one that I had confirmed worked. Swapped screens. I don't mean pulled it off the base - I mean literally pried off the plastic casing, unattached the screen cable from the circuit board, and swapped screens. Lo-and-behold, the screen from the bad stat worked fine and the screen from the good stat no longer worked. Swapped again, and same outcome. Turns out there is a problem with the circuit board.

About this time, the Resideo rep asks for more details (manufacturing date, etc). Finally get word back that they are aware of the problem and will continue to honor warranty - which still waste everyone's time responding to thermostat out calls. No recall yet, though.

Originally Posted by vkblue

So last fall we installed 255 T6 Pro Smarts (wifis) at an apartment complex. Since January, we have had some 15-20 failures where the screen goes blank. Of course, this all happens in onesy-twosies. Tried tech support through Honeywell and got "I have _never_ heard of this problem" from the help desk. Decided they were no help and went back to my distributor who talked with his Resideo rep and was told "just do a warranty replacement".

I tried putting the faulty stats on our home system (which has a T4), and the system came on, but screen was blank. So after about the 10th failure, I decided to do a little rocket surgery. Pulled the plastic cover off a broken one and a new one that I had confirmed worked. Swapped screens. I don't mean pulled it off the base - I mean literally pried off the plastic casing, unattached the screen cable from the circuit board, and swapped screens. Lo-and-behold, the screen from the bad stat worked fine and the screen from the good stat no longer worked. Swapped again, and same outcome. Turns out there is a problem with the circuit board.

About this time, the Resideo rep asks for more details (manufacturing date, etc). Finally get word back that they are aware of the problem and will continue to honor warranty - which still waste everyone's time responding to thermostat out calls. No recall yet, though.

Honeywell does not support Resideo. Resideo has zero tech support and just replaces everything under warranty. End of story.

So last fall we installed 255 T6 Pro Smarts (wifis) at an apartment complex. Since January, we have had some 15-20 failures where the screen goes blank. Of course, this all happens in onesy-twosies. Tried tech support through Honeywell and got "I have _never_ heard of this problem" from the help desk. Decided they were no help and went back to my distributor who talked with his Resideo rep and was told "just do a warranty replacement".

I tried putting the faulty stats on our home system (which has a T4), and the system came on, but screen was blank. So after about the 10th failure, I decided to do a little rocket surgery. Pulled the plastic cover off a broken one and a new one that I had confirmed worked. Swapped screens. I don't mean pulled it off the base - I mean literally pried off the plastic casing, unattached the screen cable from the circuit board, and swapped screens. Lo-and-behold, the screen from the bad stat worked fine and the screen from the good stat no longer worked. Swapped again, and same outcome. Turns out there is a problem with the circuit board.

About this time, the Resideo rep asks for more details (manufacturing date, etc). Finally get word back that they are aware of the problem and will continue to honor warranty - which still waste everyone's time responding to thermostat out calls. No recall yet, though.

Originally Posted by BALloyd

What do you have against hockey pucks? They don't take kindly to be compared to a NEST.....[emoji6]

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Good point. [emoji1787]

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"Is this before or after you fired the parts cannon at it?" - senior tech

Originally Posted by R600a

A hockey puck? [emoji1785]

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"Is this before or after you fired the parts cannon at it?" - senior tech

What do you have against hockey pucks? They don't take kindly to be compared to a NEST.....[emoji6]

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Originally Posted by Deseldo

Maybe... Maybe not, but I WILL MAKE MY DISSATISFACTION KNOWN!

You will need to call Residio. Honeywell has nothing to do with them.
If you email me I can send you the number.
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"Is this before or after you fired the parts cannon at it?" - senior tech

Maybe... Maybe not, but I WILL MAKE MY DISSATISFACTION KNOWN!

T6 isn't made by Honeywell.

You won 't get anywhere by calling them.

Originally Posted by Deseldo

Thank you Gary, that would make perfict since! I have next to nothing running on 24v so its always up at 25-27v. If there having isses above normal voltage it wouldnt take much of a spike to burn them up and that would explane them failing in waves. I think I'll be on the phone with the honeywell wannabe's in the mornong.. And I'll be damed if I'm going to eat this one anymore, I'm so tired of the corporate D'bags

Thank you Gary, that would make perfict since! I have next to nothing running on 24v so its always up at 25-27v. If there having isses above normal voltage it wouldnt take much of a spike to burn them up and that would explane them failing in waves. I think I'll be on the phone with the honeywell wannabe's in the mornong.. And I'll be damed if I'm going to eat this one anymore, I'm so tired of the corporate D'bags

15-18 months, seems to come in waves... I had 3 fail in the last 7-10 days and prior to that it was 2-3 months without a failure but it was 3-4 that time too. I was thinking it might be power surges but I would think there good to 40+V. So for it to get any higher then that on a 277 to 24v trans, that would need to be one hell of a spike and I'm not seeing where there having anything else fail at the same time (TVs-microwaves). What I do know is it's driving me insane at this point.

Originally Posted by ga-hvac-tech

I had some bad T6 PRO WiFi's...

Thankfully I have not. I've only had one defective unified wall plate which of course they can't replace separately so they replace the whole thermostat.

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Originally Posted by R600a

And only the base model not the wifi.

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"Is this before or after you fired the parts cannon at it?" - senior tech

I had some bad T6 PRO WiFi's...

Originally Posted by R600a

And only the base model not the wifi.

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"Is this before or after you fired the parts cannon at it?" - senior tech

yes agree

Originally Posted by BBeerme

The bad T6 stats were the series 4 & 5.

And only the base model not the wifi.

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The bad T6 stats were the series 4 & 5.