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Honeywell TF428DN

On/Off Valve Control Digital Thermostat

MPN: TF428DN
Category: Honeywell Building Management Systems (BMS)

Price and lead time confirmed within 1 business day

Discontinued by Honeywell — we can still source the original TF428DN (new, used or refurbished, subject to availability). Request a quote below.

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12-month warranty (new) · 3-month (used/refurbished)
30-day returns, no restocking fee on unused parts
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What is the Honeywell TF428DN?

Honeywell Digital Thermostat is designed for 3-speed fan and valve control in a fan coil system, including 2/4-pipe cool/heat/manual changeover, 4-pipe cool/heat manual /automatic changeover, Ventilation mode, Manual or automatic 3-speed fan control, Water valve control. Thermostat measures the room temperature via integrated sensor or remote temperature sensor and maintains the set point by delivering on/off valve control command outputs. Besides the basic controls, thermostat features CPH (Cycle Per Hour) better maintains the room temperature to the set point and Random Start-up Function would help to maintain power grid stability. In addition, Honeywell Memorized Time Off Function can automatically turn off the thermostat to save energy. Features & Benefits:

Energy saving mode optional

LCD display with simple user interface

Room temperature or set point temperature display selectable

Manual or automatic fan speed selectable

Temperature units in either °C or °F

User setting can be stored with power loss

Freeze protection available

Four keypad lock options

Heating and cooling set point limitationCertifications:

Honeywell TF428DN — Honeywell Digital Thermostat is designed for 3-speed fan and valve control in a fan coil system, including 2/4-pipe cool/heat/manual changeover, Ventilation mode, Manual or automatic 3-speed fan control, Water valve control. Discontinued by Honeywell — no longer in the current range. PartnerPLC sources new, surplus and discontinued Honeywell parts — request a quote for price, condition and lead time.

Specifications

Product

Lifecycle

Discontinued by Honeywell

Ordering codes

Part numbers on this product page

TF428DN, TF428LN/U, TF428SN/U, TF428WNM/U

TF428DN: frequently asked questions

Can I still buy the TF428DN now that it is discontinued?

Yes. Honeywell has discontinued the TF428DN, but sourcing discontinued parts is what PartnerPLC specialises in — new old stock, used and refurbished units. Request a quote and we'll confirm availability, condition and lead time.

When can TF428DN be shipped?

TF428DN is sourced on request — request a quote and we'll confirm the exact availability and shipping timeline for this specific unit.

Can I pick up TF428DN in person?

Local pickup from our Groningen, Netherlands warehouse may be possible — contact us before ordering to check availability and arrange a collection time.

Is express delivery available?

Yes — mention it when you request a quote for TF428DN and we'll include express shipping options in our reply.

My factory is down and I need this urgently — can you help?

For a critical breakdown, contact us directly at +31 (0)50-7110348 or sales@partnerplc.com — we can look into same-day courier or dedicated taxi/hotshot delivery for TF428DN, subject to availability and destination.