| Application: | Single-Stage (Heat/Cool) Heat Pump |
|---|---|
| Programmability: | Programmable 5-1-1 Day |
| User Interface: | Push Button |
| Mount: | Horizontal |
| Options: | Password Lockout Large Display Fan Control |
| Power Method: | Battery |
| Warranty: | 3 Year |
Please see the following: http://s3.pexsupply.com/manuals/1273854002981/30439_PROD_FILE.pdf
It appears that your thermostat is in keylock mode. To unlock it, press UP, DOWN, NEXT, HOLD, the Rotary Dial, and the Software Reset button in that sequence.
This thermostat measures approximately 5-1/2" x 3-5/8" x 1-1/8".
Dimensions in inches are: 5 7/16L x 3 5/8H x 1 1/8D
The dimensions are: 5 1/2" Long x 3 1/2" High x 1 1/8" Deep Joe
It appears that the keylock setting may be activated. You can disable this setting by pressing the 'Hardware Reset' button.
In the instructions that arrived with the instrument was a complete outline how to set this instrument.