---
product_id: 41939797
title: "- Emerson 1F85U-42PR Programmable Thermostat"
brand: "emerson"
price: "681 zł"
currency: PLN
in_stock: true
reviews_count: 10
category: "Emerson"
url: https://www.desertcart.pl/products/41939797-emerson-1f85u-42pr-programmable-thermostat
store_origin: PL
region: Poland
---

# Backlit large LCD display 7-day/5-1-1 programmable modes Easy install with built-in level - Emerson 1F85U-42PR Programmable Thermostat

**Brand:** emerson
**Price:** 681 zł
**Availability:** ✅ In Stock

## Summary

> 🔥 Stay in control, stay comfortable — the smart choice without the smart price! 💼

## Quick Answers

- **What is this?** - Emerson 1F85U-42PR Programmable Thermostat by emerson
- **How much does it cost?** 681 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/41939797-emerson-1f85u-42pr-programmable-thermostat)

## Best For

- emerson enthusiasts

## Why This Product

- Trusted emerson brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Hassle-Free Installation:** Built-in level indicator and pluggable terminals make setup a breeze—no pro needed.
- • **Advanced Security & Control:** Lockable keypad and temperature limits keep settings safe from accidental changes.
- • **Crystal Clear Backlit Display:** Read your thermostat effortlessly anytime, even in low light, thanks to the bright, large LCD screen.
- • **Customizable Weekly Scheduling:** Tailor your comfort with flexible 7-day or 5-1-1 programming modes that fit your lifestyle.
- • **Dual Fuel Ready, No Extra Sensors:** Seamlessly manage heating and cooling with dual fuel compatibility—no additional sensors required.

## Overview

The Emerson 1F85U-42PR Programmable Thermostat offers professional-grade temperature control with versatile 7-day or 5-1-1 programming, a bright backlit LCD for easy reading, and user-friendly installation features. Designed for dual fuel systems without extra sensors, it combines advanced security options like keypad lock and temperature limits, making it the perfect reliable, non-smart thermostat for modern homes and offices.

## Description

7 day / 5-1-1 / off

Review: Works great cooling and heating. Easy to program and use, even for an old fart like me - Bought to replace dying Honeywell tradeline Chronotherm T-stat. Simple to install & program and has needed features without going the smart route. Installed during peak cooling season and now well into heating season it works excellent. Holds temps both heat & cool with no short cycling. Great non smart T-stat for a great price.
Review: The easiest I’ve set up and used. - This is the easiest programable t-stat I have ever used. I had it in a hotel and decided I needed it for the house. The screen is bright when you need it but blacks out quickly when done. The numbers are also nice and large. It’s default if a 5 day a week program (M-F) but the instructions to change either to a 7 day program can be found in the ”installer” program instructions. Not the “user” program instructions which is not obvious but do-able. Bottom line: It is perfect.

## Features

- Big, clear display - easily read in low lighting
- Selectable programming - 7 day / 5-1-1 / off
- Easy installation - built in level indicator, pluggable terminals and streamlined configuration menu
- Advanced features - keypad lock, temperature limits, backlight button
- Dual fuel standard - no sensors needed

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B017ES1PHM |
| Backlight | Yes |
| Batteries | 2 AA batteries required. (included) |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
| Best Sellers Rank | #193,135 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #224 in Home Programmable Thermostats |
| Brand | Emerson |
| Color | 3.75 |
| Control Method | Touch |
| Control Type | Button Control |
| Controller Type | Hand Control |
| Customer Reviews | 4.6 4.6 out of 5 stars (135) |
| Date First Available | November 5, 2015 |
| Display Type | LCD |
| Global Trade Identification Number | 00786710551871 |
| Included Components | thermostat |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 9.2 ounces |
| Item model number | 1F85U-42PR |
| Manufacturer | Emerson Climate Technologies |
| Material | Metal, Plastic |
| Mounting Type | Wall Mount |
| Number of Batteries | 2 AA batteries required. (included) |
| Part Number | 1F85U-42PR |
| Power Source | Ac/dc |
| Product Dimensions | 6"D x 1.13"W x 3.75"H |
| Screen Size | 5 Inches |
| Shape | Rectangular |
| Special Feature | Lockable, Low Battery Indicator, Low Voltage, Programmable, Temperature Display |
| Special Features | Lockable, Low Battery Indicator, Low Voltage, Programmable, Temperature Display |
| Specific Uses For Product | Air Conditioner, Boiler, Furnace, Heat Pump |
| Style | 1F85U-42PR (new model) |
| Temperature Control Type | Programmable |
| UPC | 786710551871 |
| Voltage | 100240 Volts |

## Product Details

- **Brand:** Emerson
- **Color:** 3.75
- **Controller Type:** Hand Control
- **Product Dimensions:** 6"D x 1.13"W x 3.75"H
- **Special Feature:** Lockable, Low Battery Indicator, Low Voltage, Programmable, Temperature Display

## Images

![- Emerson 1F85U-42PR Programmable Thermostat - Image 1](https://m.media-amazon.com/images/I/71z-xyfRdkL.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: How do i orogram my new thermostat**
A: It came with instructions and if you read them carefully several times and take one item at a time, you should be able it complete all the steps .  It might be easier to have someone read each step to as you input them on the thermostat.   Good luck.

**Q: How do i take the lock off?**
A: White Rodgers Customer Service is excellent.  888-725-9797 or 800 284 2925

**Q: How does it switch to fossil fuel heat?**
A: Automatically.  There's usually a preset temperature (mine is 25 F) for the temp at which it should switch over.  Alternatively, you can choose to run on fossil.

**Q: can it be used for heater only?**
A: Not sure I quite understand the question regarding "heater". But this thermostat can be used for heat or cooling and it can be used with a heat pump (which is exactly how I am using it).

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works great cooling and heating. Easy to program and use, even for an old fart like me
*by R***E on November 29, 2025*

Bought to replace dying Honeywell tradeline Chronotherm T-stat. Simple to install & program and has needed features without going the smart route. Installed during peak cooling season and now well into heating season it works excellent. Holds temps both heat & cool with no short cycling. Great non smart T-stat for a great price.

### ⭐⭐⭐⭐⭐ The easiest I’ve set up and used.
*by J***. on November 26, 2025*

This is the easiest programable t-stat I have ever used. I had it in a hotel and decided I needed it for the house. The screen is bright when you need it but blacks out quickly when done. The numbers are also nice and large. It’s default if a 5 day a week program (M-F) but the instructions to change either to a 7 day program can be found in the ”installer” program instructions. Not the “user” program instructions which is not obvious but do-able. Bottom line: It is perfect.

### ⭐⭐⭐⭐⭐ Nice & Easy Thermostat
*by K***E on January 20, 2026*

Great thermostat. We chose not to get the WiFi connected Emerson version because we didn’t need it. (We wanted a “simple-to-operate” and it is! ). Brand is actually White Rodger’s/Emerson.

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*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-05-30*