TX500U

Advice for troubleshooting your TX500U thermostat

How do I switch between 12 hr and 24 hr time on my thermostat?
The following steps will allow you to switch between Standard and Military time: Remove the front cover of the thermostat from the wall.  On the circu...
Wed, 26 Sep, 2018 at 11:46 AM
How do I adjust calibration on my thermostat?
If you wish to adjust the displayed temperature up or down, there is calibration feature in your thermostat.  Although it is factory calibrated and should n...
Wed, 26 Sep, 2018 at 11:46 AM
How do I set day & time on my thermostat?
If you wish to change the day and or time, perform the following steps: open the front door of the thermostat. Slide the SET slide switch in the upper...
Wed, 26 Sep, 2018 at 11:47 AM
How do I switch between Fahrenheit and Celsius on my thermostat?
To change the temperature displayed to read Celsius instead of Fahrenheit, (or Fahrenheit to Celsius): Take the front cover off the stat off the wall.  L...
Wed, 26 Sep, 2018 at 11:47 AM
Can I switch between 2 and 4 period programming?
The thermostat comes from the factory set at 4 periods per day.  This allows you to program 4 different start times with 4 different temperatures throughout...
Wed, 26 Sep, 2018 at 11:47 AM
Can I disable a programmed schedule on my thermostat?
This feature allows the thermostat to be placed in either programmable or manual operating mode.  In programmable mode, the thermostat controls the room...
Wed, 26 Sep, 2018 at 11:47 AM
How do I program the schedule on my thermostat?
There are four periods per each grouping of days, for Heat mode and Cool mode.  They are: MORN, DAY, EVE, NITE.  ALL 4 periods MUST be set for the thermosta...
Wed, 26 Sep, 2018 at 11:48 AM
How do I reset my thermostat?
If your thermostat is behaving erratically or something strange is in the display, hitting “Reset” buttons can often correct the problem. Hardware...
Wed, 26 Sep, 2018 at 11:48 AM
What is cycle duration?
This only applies to these (3) “Ua” and “Ub”  thermostats Swing settings (#1 - #9) do not apply to these thermostats.  Instead, the adjustment is called...
Wed, 26 Sep, 2018 at 11:48 AM
How do I adjust the temperature differential for 2nd stage heating?
The OFFSET setting is shown as number of degrees (default = 4F). It is similar in nature to the Swing setting, however,  it only effects the operation of th...
Wed, 9 Jan, 2019 at 2:05 PM