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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White-Rodgers 80 Series, Programmable, Single Stage Thermostat, 1F83C-11PR

White-Rodgers 80 Series, Programmable, Single Stage Thermostat, 1F83C-11PR

Product ID: 24554664

Details

Brand
White-Rodgers
Controller Type
Hand Control
Model Name
80 Series
Product Dimensions
6"D x 1.13"W x
Special Feature
Clock Display

📺4.5-inch backlit LCD display

🔋Dual power: battery & hardwire

⚙️7-day/5-1-1 programmable modes

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€ 115.35

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Sold byAmazon BelgiumDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

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

DUAL FUEL READY - Works seamlessly with dual fuel systems—no extra sensors needed, future-proof your home.
EFFORTLESS SETUP - Built-in level indicator and pluggable terminals make installation a breeze—no tech headaches.
TAILORED SCHEDULING - Flexible 7-day or 5-1-1 programmable options put you in full control of your comfort.
CRYSTAL CLEAR DISPLAY - Big 4.5-inch backlit screen ensures easy reading anytime, even in low light.
SMART SAFETY FEATURES - Keypad lock and temperature limits protect your settings and system integrity.

The Emerson 1F83C-11PR is a sleek, programmable thermostat featuring a large 4.5-inch backlit LCD display, versatile 7-day or 5-1-1 scheduling, and dual power options (battery and hardwired). Designed for easy installation with a built-in level and pluggable terminals, it includes advanced features like keypad lock, temperature limits, and dual fuel compatibility without extra sensors. Perfect for professionals seeking reliable, customizable climate control with a modern interface.

Specifications

ASIN	B0175T36PO
Additional Features	Clock Display, Filter Indicator, Low Voltage, Programmable, Temperature Display
Backlight	Yes
Best Sellers Rank	#70,684 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #40 in Home Nonprogrammable Thermostats
Brand Name	White-Rodgers
Color	White
Connectivity Protocol	Wi-Fi
Connectivity Technology	Wi-Fi
Control Method	Touch
Control Type	Button Control
Controller Type	Hand Control
Customer Reviews	4.6 4.6 out of 5 stars (401)
Display Type	LCD
Global Trade Identification Number	00786710551635
Included Components	2 AA Batteries, Thermostat, User Manual
Item Dimensions D x W x H	6"D x 1.13"W x 3.75"H
Item Type Name	thermostat
Manufacturer	Copeland
Manufacturer Part Number	1F83C-11PR
Material Type	Plastic
Model Name	80 Series
Model Number	1F83C-11PR
Mounting Type	Wall Mount
Number of Batteries	2 AAA batteries required. (included)
Power Source	Battery Powered
Product Style	1F83C-11PR (new model)
Screen Size	4.5 Inches
Shape	Rectangular
Specific Uses For Product	Air Conditioner, Furnace, Heat Pump
Temperature Control Type	Programmable, Digital
UPC	786710551635
Unit Count	1.0 Count
Voltage	24 Volts

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