AUTO Schedule Override: Active until the next scheduled period
starts or the timed override duration has ended.
Schedule Off: Programmed schedule is turned off.
Low Battery: Power has reached approximately 10% (see Changing the Batteries).
Heat Demand: Room temperature is below setpoint – indicating
there is a demand for heating (boiler activity might occur).
Wireless Signal: The thermostat (T4R only) is connected to the Receiver Box.
Menu: Options and settings of your Thermostat:
Clock
Date
Keypad lock
Optimization
OpenTherm® boiler alerts (T4M only)
Away Mode
Confirm: Confirm a change or selection.
Timed override: Set a timed duration for the override.
Standby: Turns the heating on or off.
Home: Returns you directly back to the home screen.
Heating schedule
Your Thermostat comes with the following default schedule. Follow the next steps to adjust the heating schedule
Days 1 to 5 (Mon to Fri) | Days 6 & 7 (Sat & Sun) | |||
Period | Time | °C | Time | °C |
P1 | 6:30 – 8:00 | 19 °C | 8:00 – 10:00 | 19 °C |
P2 | 8:00 – 18:00 | 16 °C | 10:00 – 18:00 | 16 °C |
P3 | 18:00 – 22:30 | 21 °C | 18:00 – 23:00 | 21 °C |
P4 | 22:30 – 6:30 | 16 °C | 23:00 – 8:00 | 16 °C |
Days 1 to 5 (Mon to Fri) | Days 6 & 7 (Sat & Sun) | |||
Period | Time | °C | Time | °C |
P1 | 6:30 – 8:00 | 19 °C | 6:30 – 10:00 | 19 °C |
P2 | 8:00 – 12:00 | 16 °C | 10:00 – 12:00 | 16 °C |
P3 | 12:00 – 14:00 | 21 °C | 12:00 – 14:00 | 21 °C |
P4 | 14:00 – 18:00 | 16 °C | 14:00 – 18:00 | 16 °C |
P5 | 18:00 – 22:30 | 21 °C | 18:00 – 23:00 | 21 °C |
P6 | 22:30 – 6:30 | 16 °C | 23:00 – 6:30 | 16 °C |
Date
To make adjustments to the date – Year/Month/Day.
Keypad lock
You can lock the keypad to prevent unnecessary adjustments to the Thermostat.
Your Thermostat has optimization functions that aim to save energy while maintaining suitable comfort levels. The Thermostat displays
see instructions in the installation guide on how to activate it.
To enable or disable an optimization function:
OpenTherm® boiler alerts (T4M only)
If you have T4M Thermostat fitted to an OpenTherm® boiler, you can view alerts received from the boiler about your heating system.
Away mode
Save energy by switching the heating off for a set period of time while you are away from home – and back on again in time for your return.
Standby mode (with frost protection)
Save energy by switching the heating off when not required – e.g. during warmer summer months, or when doors and windows are open for extended periods of time. If the temperature drops to 5°C the heating will come on to prevent the heating pipes from freezing.
During normal use, your Thermostat will follow the programmed schedule – indicated by the AUTO icon in the top right of the display. There are a few ways you can override the schedule to suit your current needs
AUTO
Set until the next programmed setpoint is reached.
23 H Timed Override
Can be used to Boost (increase) the heating for a short period or as an Economy (decreased) setting if leaving the house for a short period.
Turn the Schedule Off (Manual Mode)
Turn the heating schedule off and permanently follow a single (adjustable) temperature – until the schedule is turned on again.
Delete period
Turn the heating schedule off and permanently follow a single (adjustable) temperature – until the schedule is turned on again.
The Thermostat is powered by batteries, although a battery icon is not shown on the display during normal use. The only time you will see the battery icon is when they get low on power.
Please help to protect the environment by recycling old batteries in accordance with local regulations
The T4R Thermostat communicates wirelessly to the Receiver Box which is wired to the boiler. If the Thermostat loses wireless communication or becomes faulty, the boiler can be switched on or off manually using the button on the Receiver Box.
To manually override the boiler using the Receiver Box:
If you have difficulty with your Thermostat, try these suggestions. Most problems can be corrected quickly and easily.
All models | |
Screen is blank | Replace the batteries (T4 & T4R only). Check the OpenTherm boiler has power (T4M only). Contact installer. |
Thermostat shows | Batteries have less than 10% power and need to be replaced soon. |
Thermostat shows + | Batteries are critically low and need to be replaced immediately – see ‘Changing the Batteries’. |
Thermostat shows but the boiler does not switch on. | The boiler cycles on and off as it controls the temperature, and sometimes the icon will be displayed when the boiler has cycled off. If the boiler doesn’t switch on after a long period of time contact your installer. |
Heating system does not respond to temperature adjustments. | Make sure the set temperature is higher than the actual room temperature. Check the heating system is powered on. Check the Receiver Box is powered and the Thermostat has a wireless signal (T4R only). |
Thermostat shows
| The temperature sensor of your Thermostat is faulty, contact your installer to repair or replace the Thermostat. |
T4R (Wireless) Thermostat & Receiver Box only | |
Thermostat is flashing | Wireless signal lost – Move the Thermostat to another location to try and restore communication. |
Thermostat is flashing | Check Receiver Box has power by pressing the button to switch boiler on. If Receiver Box has power then no wireless binding data stored – Follow binding procedure in the installation guide or contact your installer. |
Receiver Box | Receiver Box is in binding mode – will time out of this mode after 3 minutes. |
T4M (OpenTherm) Thermostat only | |||
An OpenTherm boiler can report alerts back to the Thermostat which can be useful when contacting an installer or maintenance engineer. You can view these in the ‘OpenTherm® boiler alerts’ menu. | |||
Description | ID | Error code | OT Reading |
Service request | 001 | 01SR | 0 = service not required 1 = service required |
Low water pressure | 002 | 02WP | 0 = no WP fault 1 = WP fault |
Gas/flame fault | 003 | 03GF | 0 = no GF fault 1 = GS fault |
Air pressure fault | 004 | 04AF | 0 = no AP fault 1 = AP fault |
Water Over Temperature | 005 | 05WT | 0 = no OVT fault 1 = OVT fault |
OEM specific | 006 | 06OS | Boiler manufacturer specific code |
2020 Resideo Technologies, Inc. All rights reserved.
The Honeywell Home trademark is used under license from Honeywell International Inc.
This product is manufactured by Resideo Technologies, Inc. and its affiliates.
Pittway 200 Berkshire Place, Wharfedale Road, Winnersh,
Berkshire, RG41 5RD
http://homecomfort.resideo.com/
Tel: 0300 130 1299
32318059-001 D
Download Manual
Honeywell T4 Programmable Thermostat User
OTHER MANUALS
Honeywell T4 Programmable Thermostat Product SPECIFICATION SHEET
Johnson Controls T7000e LCD Digital Thermostat Johnson Controls T7000e LCD Digital Thermostat Installation Guide
Honeywell T8635L Microelectronic Communicating Programmable Thermostat Honeywell T8635L Microelectronic Communicating Programmable Thermostat USER’s GUIDE
Hetta HS01RF WIRELESS THERMOSTAT Kit PAIRING INSTRUCTIONS Insert batteries into the Thermostat. Ensure that the…
HEAT-MAT NGT-567-0010 Underfloor Heating Thermostat Menu Introduction The NGT thermostat can switch your underfloor heating…
Honeywell RLV450 PROGRAMMABLE THERMOSTAT READ BEFORE INSTALLING DESCRIPTION * LP appears only for the first…
Honeywell RLV431 Programmable Thermostat Description The RLV431 thermostat can be used to control an electric…