Infinity controller - puts out its own heat?

9 years ago

Hello - we just had a brand new Infinity system installed yesterday, and so far so good. Very pleased with the cooling and humidity control. This is just a quick question for those experienced with the Wi-Fi controllers. Ours is the newest "B" model. I think it puts out its own heat which skews the displayed temp. We took the old mercury stat and put it on top of the new stat, and it reads the same, but that reflects the heat coming out the top of the new stat. We put 2 other thermostats about 18 inches below and to the side on a table, and they both read appx 3 degrees cooler - and more consistent with what my body tells me the temp should be. (The outside temp as shown on the Infinity stat is consistent with other stats and weather.com.)

Am I interpreting this correctly and can I do a manual re-set of the displayed temp to subtract 3 degrees?

Thanks!

NovaRemodeler

Featured Answer

mike_home

9 years ago

last modified: 9 years ago

The controller has a LCD display and simple electronics which generates practically no heat. That is not the problem.

Do you know if the installer left a hole in the wall behind the Infinity controller? It is possible that warn unconditioned air may be coming out from behind the controller and skewing the temperature reading. Placing the old thermostat seems to support this theory. You would need to remove the controller and either patch the hole or stuff it with some insulation.

It is possible to go into the service menu and make an offset adjustment. However a 3 degree error seems like a lot. I would first investigate installation issues before making a big adjustment.

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Comments (8)

User
Original Author
9 years ago
Thanks Mike - My first reaction is that they didn't need to do a larger hole than what was there before. There is no dust or debris on the baseboard or floor below the stat. I can remove the back plate to make sure. I'm going to read the installation and operating manuals this weekend and ask the installer next week about an offset if I'm still getting these high readings.
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User
Original Author
9 years ago
I'm back with an update. Apparently there is a way to make an offset adjustment for the outside temp (and also humidity), but I didn't find how to do one for the inside temp. I have a service call for my other system in a few weeks so I will ask then, but I thought I'd see what feedback I could get from the folks here. Particularly whether others are experiencing the same issue.

The variation in temps is still in the 3 degree range. Two digital thermostats I'm using to test provide displays to tenths of a degree, but of course the Infinity stat displays in whole degrees.

The panel is warm to the touch on the display itself, as opposed to the frame around the display which is not warm. I still suspect that's the cause. My wall is a solid old plaster and lath wall, and they only replaced the old stat without changing locations.

Maybe Carrier will see some discussions like this and push a software update through the Wi-Fi.

Thanks,

NR
mike_home
9 years ago
This should be the installation manual for your controller. Not sure if your "B" model is different. Page 23 talks about offset adjustments. I did an offset on the previous generation Infinity controller. I have not tried it on this generation. I would imagine it works the same.

I would ask for the controller to be replaced. A 3 degree error seems too large. If you made the offset I would be concerned how it would track the temperature range. Maybe it is not an issue since the indoor temperature range is small.
User
Original Author
9 years ago
Yes thanks. That's the one. The instructions seem to suggest that only outside temp and humidity may be offset (I haven't tried to actually do it though since I'm concerned about inside temp). Right now, it's showing 76 when the "control" stats are showing 72.5. I have the maintenance scheduled for Nov. 3 so this will be a little irritant until then . . . Otherwise, I'm very happy with the a/c and humidity control.
User
Original Author
8 years ago
They pushed an update to offset the 3 degrees today. My contractor had done the 3 degree adjustment a couple weeks ago so I had to subtract the 3 degrees today.
mike_home
8 years ago
That's interesting that a software update now allows the thermostat to improve the accuracy by 3 degrees. I would not have expected that.
User
Original Author
8 years ago
The beauty of Wi-Fi!

And perhaps also a sign that Carrier has someone reading these sites to improve their products.

I'm a happy customer.

NR