My temperature keeps dropping at different times of the day, but esp. at night before 9pm
And even though the number on the right says 69 the left side says 63-it does this a few different times during the day & I have to play with it to get the heat on again.
I have a White Rodgers programmable thermostat & maybe I am running it on a program without realizing it-how do I maintain 1 constant temperature as I used to at 67 degrees?
I cannot find my manual.Thank you!

My temperature keeps dropping at different times of the day, but esp. at night before 9pm
and even though the number on the right says 69 the left side says 63-it does this a few different times during the day & I have to play with it to get the heat on again.
I have a White Rodgers programmable thermostat & maybe I am running it on a program without realizing it-how do I maintain 1 constant temperature as I used to at 67 degrees?
I cannot find my manual.Thank you!
What is on the left? Room temperature?