How to remove hold notice on the screen?

Try removing batteries for a few seconds and then replacing .

I'm looking for the emer option, because I have geo thermal with electric backup furnace? Does this thermo have emer?

I don't believe so because this thermo is designed for single-stage. Here's a pdf of the wiring diagram for your review. http://www.emersonclimate.com/Documents/White-Rodgers/instruction_sheets/0037-6754.pdf

Does this thermostat retain program when you change the battery or do you have to reprogram it again?

The programming is preserved. The thermostat is powered through the wire connecting it to the heating system. The batteries preserve settings when there is a power outage.

Just installed this thermostat—why does the a/c compressor run in heat mode?

you probably have the heat / cool wires crossed. Carefully check your connections. Look at the wiring diagram of the thermostat

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🌡️ Stay cool, stay smart—control your comfort like a pro!

SECURE SMART - Keypad lock and temperature limits protect settings while the backlight button adds convenience.
DUAL FUEL READY - Works seamlessly with dual fuel systems—no extra sensors required, future-proof your HVAC.
HASSLE FREE SETUP - Built-in level indicator and pluggable terminals make installation a breeze—no pro needed.
CRYSTAL CLEAR CONTROL - Big, bright 4.5-inch backlit display ensures effortless temperature reading anytime.
TAILORED COMFORT SCHEDULING - Flexible 7-day or 5-1-1 programmable options adapt perfectly to your weekly routine.

The Emerson 1F83C-11PR is a sleek, programmable single-stage thermostat featuring a large 4.5-inch backlit display, versatile 7-day or 5-1-1 scheduling, and easy installation with built-in leveling and pluggable terminals. Designed for dual fuel systems without extra sensors, it offers advanced security with keypad lock and temperature limits, making it the perfect upgrade for efficient, customizable home climate control.

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Brand	Emerson
Model Number	1F83C-11PR
Color	White
Product Dimensions	15.24 x 2.86 x 9.53 cm; 276.69 g
Voltage	24 Volts
Material	Plastic
Special Features	Programmable
Item Weight	277 g

Emerson 1F83C-11PR Conventional (1H/1C) Programmable Thermostat

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