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Honeywell T678A1015 Line Voltage Mechanical Thermostat - Indoor Single-Stage Controls
HoneywellIndoor Single-Stage Controls

Honeywell T678A1015 Line Voltage Mechanical Thermostat

The Honeywell T678A1015 is an indoor single-stage line-voltage mechanical thermostat with a temperature control range of 0° to 100°F and an adjustable differential of 3° to 10°F. It features a steel enclosure, SPDT…

SKU 3G-OTH-68135

Brand
Honeywell
Item
T678A1015 Line Voltage Mechanical Thermostat
Category
Indoor Single-Stage Controls
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

Honeywell
Manufacturer Part Number
T678A1015
Type
Steel, Adj, 3° to 10°F, 0° to 100°F
Voltage
120 to 277V AC
Differential Type
Adjustable
Enclosure Material
Steel
Switch Type/Action
SPDT, Open/Close on Rise
Defrost Termination
0° to 100°F
Temperature Differential
3° to 10°F
Temperature Control Range
0° to 100°F
Capillary Length/Bulb Diameter
20 ft Capillary, 4-3/16 in x 1/2 in Bulb

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

Product Description

The Honeywell T678A1015 is an indoor single-stage line-voltage mechanical thermostat with a temperature control range of 0° to 100°F and an adjustable differential of 3° to 10°F. It features a steel enclosure, SPDT switch action (open/close on rise), and operates on 120 to 277V AC. The unit includes a 20 ft capillary with a 4-3/16 in x 1/2 in bulb and a defrost termination range of 0° to 100°F.

Frequently Asked Questions

What is the Honeywell T678A1015 line volt mechanical thermostat used for?

The Honeywell T678A1015 is used for indoor single-stage temperature control in commercial or industrial HVAC applications. It manages heating or cooling equipment by opening or closing on temperature rise, with a range of 0° to 100°F and an adjustable differential of 3° to 10°F.

What are the specifications of the Honeywell T678A1015 thermostat?

The Honeywell T678A1015 has a temperature control range of 0° to 100°F, an adjustable differential of 3° to 10°F, and operates on 120 to 277V AC. It features a steel enclosure, SPDT switch action (open/close on rise), a 20 ft capillary with a 4-3/16 in x 1/2 in bulb, and defrost termination from 0° to 100°F.

Where to buy the Honeywell T678A1015 thermostat worldwide?

You can source the Honeywell T678A1015 thermostat through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time on this Honeywell part.

How to install the Honeywell T678A1015 line volt thermostat?

Install the Honeywell T678A1015 by mounting the steel enclosure securely, routing the 20 ft capillary and bulb to the sensing location, and wiring the SPDT switch per the voltage rating (120 to 277V AC). Set the temperature control range and adjustable differential as needed. Always follow local electrical codes and the manufacturer's instructions.

Used in

Common applications for Honeywell
Commercial kitchen and inflight-catering steam boilers — RM7890 / RM7895 flame relays with UV detection
Food-processing ramp-and-dwell ovens — DBC2000E / DBC2100E controllers
Hotel and hospital boiler plants — VR8205 combination gas controls
Petrochemical tank-farm heating — V4xxx gas-valve bodies with ML7420 actuators
Retrofit swap-outs from legacy Fireye / Satronic — Honeywell replacement kits

Honeywell Products

3G Electric supplies Honeywell indoor single-stage controls. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Indoor single-stage line-voltage mechanical thermostat with a temperature control range of 0° to 100°F and adjustable differential from 3° to 10°F. Features a steel enclosure, SPDT switch action (open/close on rise), and operates on 120 to 240V AC. Includes a 20 ft capillary with a 4-3/16 in x 1/2 in bulb. Suitable for HVAC temperature control in commercial or industrial settings
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