Ever Hear of this T-stat Malfunction?

Jim_64

and see what happens

Kool Rod

Here's the Problem

Two times now, on Friday and Tuesday afternoon, I've come home from work and found my Honeywell VisioPro t-stat set higher than programmed. We use a daytime set back (b/c nobody is in the building) with the heat scheduled to turn on at 3:15 p.m. when the children get home from school. It is set to turn on at 68. When I came home Friday, the t-stat was "set" at 74 and today at 73.

I live in a four unit apt blding, and the t-stat is located in a common hallway, with a sensor in an apt. One pipe steam.

All residents, and the upstairs babysitter, all deny touching the t-stat.

Anyone ever hear of it malfunctioning like this? I'm very skeptical.

Kool Rod

What Do you Mean . . .

by lock it out? Put a cover over it or are you talking about something else?

Thanks.

Mike Dunn

you can

program it such that no one can make any changes. I believe you need to access the installer setup portion of the programming. The manual will tell you.

Mike

Kool Rod

Thanks . . .

I'll do that.

ed wallace

tstat probem

you have been visited by
didnt do it,
not me,
i dont know

Kool Rod

you forgot . . .

... I don't know how to change it.

Terry in NJ

isn't there a setting for EACH day of the week?

perhaps the settings aren't the same across the board

Kool Rod

Except

that I had reset the t-stat that morning before leaving for work. We keep them the same Mon-Fri, and then have different settings for the weekend.

Terry in NJ

my model shows both room temp and temp setting at the same time

so one needs to be careful which one is being referenced.

Jim_64

lockout programming

you didn't state the model #, but this may get you where you need to be
http://customer.honeywell.com/techlit/pdf/69-0000s/69-1701.pdf
scroll to page 34

Supply House Rick

time to move the thermostat

it's time to move the main thermostat to a protected area. a similar unit, which is not connected could be put in its place. then you can be certain that there has been no outside interference. many of the temperature swings you were trying to correct may have been because of other neighbors' adjustments!--nbc

Kool Rod

Lock It Out

I'm going to lock it out if that feature is included in my model, which I believe it is b/c I seem to recall reading something about it. I can't move the t-stat b/c all residents, all of whom are owners of the building in this cooperative, need to have access to the t-stat. I have a Honeywell VP 8000, which has a keypad lock function, which I will enable today before leaving work.

Jim_64

the 8k

def has a lockout feature, and with option levels

http://customer.honeywell.com/techlit/pdf/69-0000s/69-1701.pdf
scroll to pages 33-34

Kool Rod

Thank You

I just looked at the install manual and located the code for it.

Howard Emerson

High limit built in............

Hi Frank,
This company, Jackson, makes thermostats that have a hidden high limit, regardless of what the tenant sets it to. I own one that has a 73, but I should have gotten the 71.

Here's an add on that they make that gets wired between the boiler and the thermostat that only allows 70.

http://www.prothermostats.com/product.php?p=jackson-systems_tl-70h&product=110059

HE

Kool Rod

I might be able to do that . . .

I see that I have a set up function called "Heat Temperature Range Stop," which seems to have a factory default of 90 degrees as the max heat temp setting. Maybe I can lower it to 70, which would prevent anyone from setting it above 70. I like that idea better.

Just set this function so that heat setting cannot be put above 70 degrees. That should do the trick.

Unknown

Vision Pro 8000

If you have the 8000 function 600 is the heating limit and 610 is the cooling limit. Once you set them you don't even have to lock out the thermostat.

Frank_63

Yes

Thanks. That is exactly what I did. I like that option better. We use an aftnoon setback, but sometimes a person will be home during that time and I want that person to be able to raise the setting if it gets too cold.

kevink1955

You can also do a partial keypad lock as well as seting the limit to 70. Partial keypad lock will prevent anyone from changing the schedule setbacks you have set but still allow them to set it to the limit. The adjustment will cancel at the next schedule change.