Send a part number, a photo, or a whole BOM — we supply it and stand behind it. EXW Singapore — collect from our office.

3G Electric
EMERSON 01F89 211S1 Digital Thermostat, 20V AC, Manual Changeover, Heat/Cool - Digital Thermostats
EMERSONDigital Thermostats

EMERSON 01F89 211S1 Digital Thermostat, 20V AC, Manual Changeover, Heat/Cool

The EMERSON Low Voltage Thermostat (SKU 01F89 211S1, MPN 01F89 211S1) is a digital thermostat for Heat or Cool applications. It operates on 20V AC with a manual changeover and system settings of Cool-Heat-Off. Key…

SKU 3G-OTH-70508

Also listed as: 01F89211S1 · 01F89-211S1

Brand
EMERSON
Item
01F89 211S1 Digital Thermostat, 20V AC, Manual Changeover, Heat/Cool
Part Number
01F89 211S1
Category
Digital Thermostats
Available to Order
Also known as:01F89 211S1EMERSON
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
EXW Singapore
Collect or forward from our office
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.

Technical Specifications

EMERSON
Manufacturer Part Number
01F89 211S1
Type
Manual, C/E/G/L/O/B/R/W2/Terminal Designations
AC
20V
Shape
Rectangle
Voltage
20V AC
Digit Size
Standard
Application
Heat or Cool
Control Type
Slide Switch
Fan Settings
Auto-On
Key Features
Batteries Not Required
Changeover Type
Manual
System Settings
Cool-Heat-Off
Mounting Direction
Horizontal
Terminal Designations
L
Temperature Differential
0.6° to 1.5°F
Temperature Control Range
45° to 99°F

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

EMERSON Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The EMERSON Low Voltage Thermostat (SKU 01F89 211S1, MPN 01F89 211S1) is a digital thermostat for Heat or Cool applications. It operates on 20V AC with a manual changeover and system settings of Cool-Heat-Off. Key specs include a temperature control range of 45° to 99°F, a temperature differential of 0.6° to 1.5°F, and terminal designations including L. Batteries are not required, and it features a slide switch control, Auto-On fan setting, and horizontal mounting.

Frequently Asked Questions

What is the EMERSON 01F89 211S1 thermostat used for?

The EMERSON 01F89 211S1 is a low voltage digital thermostat for Heat or Cool applications. It provides manual changeover between cooling and heating, with system settings of Cool-Heat-Off. It is suitable for controlling HVAC systems in commercial or industrial environments where reliable, battery-free operation is required.

What are the specifications of the EMERSON 01F89 211S1 thermostat?

The EMERSON 01F89 211S1 operates on 20V AC with a temperature control range of 45° to 99°F and a differential of 0.6° to 1.5°F. It features manual changeover, slide switch control, Auto-On fan setting, and terminal designations including L. Batteries are not required, and it mounts horizontally.

Where to buy the EMERSON 01F89 211S1 thermostat worldwide?

3G Electric supplies the EMERSON 01F89 211S1 thermostat to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your location. Contact us for pricing and lead time on this low voltage thermostat.

How to install the EMERSON 01F89 211S1 thermostat?

Install the EMERSON 01F89 211S1 thermostat by mounting it horizontally on a wall. Connect the 20V AC power supply to the appropriate terminals (C/E/G/L/O/B/R/W2). Ensure the manual changeover switch is set to Cool, Heat, or Off as needed. No batteries are required for operation.

Used in

Common applications for EMERSON
Residential HVAC — Emerson 1F87U-42WF low-voltage WiFi thermostat for 7-day programmable heat and cool control
Light commercial buildings — Emerson 2E399 line-voltage mechanical thermostat for indoor single-stage heating or cooling
Industrial process control — Emerson 586-314111 DC power solenoid for high-current switching in 24 V DC systems
Remote temperature sensing — Emerson F0145 132800S1 hardwired sensor for White-Rodgers 90 Series thermostats
Thermostat replacement — Emerson 3MY21 wall cover plate for White-Rodgers 1F80 Series installations
HVAC control panels — Emerson 1RC43 line-voltage thermostat with SPST switch for capillary bulb applications
Not sure this is the right part? Photo-identify it→

EMERSON Products

3G Electric supplies EMERSON digital thermostats. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

More from EMERSON

View all EMERSON parts →

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first