Honeywell DT90E Digital Room Thermostat + ECO Product Code: 41365

Includes ECO button with countdown display for energy saving mode. CE marked. Conforms to protection requirements of 2006/95/EC & 2004/108/EC. WEEE & RoSH compliant.


  • Digital Display
  • Mains or Low Voltage Switching
  • 1 Year Guarantee
  • Mains or Low Voltage Switching


Switch/contact rating: SPDT. 8A. Temp. range: 5°-35°C. H x W x D: 92 x 90 x 29mm. 2 x AA batteries supplied.
Additional Information
Technical Specification
  • Brand : Honeywell
  • Product Height : 92 mm
  • Display Type : Digital Display
  • Product Type : Digital Room Thermostat + ECO
  • Zoning Level : One
  • Central Heating Control Type : Thermostats
  • Total Product Weight : 0.15 kg
  • Model No : DT90E
  • Product Width : 90 mm
  • Temperature Range : 5-35 °C
  • Product Depth : 29 mm
  • Pack Size : 1
  • Switch Type : SPDT
  • Compatible Boiler Type : All Boilers
  • Manufacturer Guarantee : 1 Year Guarantee
  • Pieces in Pack/Case : 1
Product Contents
Delivery & Returns


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€40.45 Incl. 23% VAT

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Honeywell DT90E Digital Room Thermostat + ECO is rated 4.4 out of 5 by 131.
Rated 5 out of 5 by from Really reliable kit Easy to fit even for the diy’er Far better than an analog , accurate to 2 deg unlike the analog which was 6-7 deg out. Would recommend
Date published: 2019-04-13
Rated 5 out of 5 by from DIYer Replaced Honeywell mechanical thermostat. It was an exact fit so no messing about. Only needed two of the four available wires so earth and neutral capped off for another day. Easy to use and appears to be very accurate.
Date published: 2019-04-05
Rated 4 out of 5 by from Digital room stat Good product, easy to connect up, bit fiddly to open up again once clicked together but simple to use.
Date published: 2019-03-03
Rated 5 out of 5 by from Excellent Thermostat Bought this to replace a very old Drayton RTS1 room thermostat. Easy to fit once I discovered that it needed only 2 wires - live in (Terminal A and switch live (Terminal B). Do not use the neutral. There is a small piece of cardboard isolating one of the battery terminals underneath the front cover that needs to be removed. Very accurate, and marked difference in, temperature management; boiler does not stay on as long as previously. Overall, excellent, good value product
Date published: 2019-02-22
Rated 5 out of 5 by from Easy to use and install Easy to install, looks good. Competitive price, and well made.
Date published: 2019-02-20
Rated 5 out of 5 by from Easy to use basic thermostat This thermostat has enabled accurate control of our room temperature only varying by a maximum of 0.5 degrees. It regularly brings the boiler on for short intervals in order to keep the temperature topped up. Controls are very easy to use, one push of the button reviews current temperature setting with further pushes stepping the temperature up or down in steps of half a degree. The normal continuous easy to read display shows the current room tempersture. I'm confident this must of saved on our gas usage.
Date published: 2019-02-17
Rated 2 out of 5 by from Best to read this first! READ THIS READ THIS.there are NO useful instructions in the box and none on utube. The forums even on Screwfix are of limited use because they all start arguing with each other. For virtually all British installations it is a two wire unit, live (red)and switched live. Terminal 1 live. If coming from a 3 wire, use red live terminal 1 And yellow switched live terminal 2, don’t use the blue neutral at all, tape it up. The thermostat comes with batteries, but nowhere does it tell you there is a white bit of plastic isolating them from the terminals, you really have to know it’s there and remove it. The instructions don’t tell you how to programme it, but if you google “ guide to the use of the dt90e room thermostat” there is a really great guide, and Honeywell have put it on but kept it a secret!, Best of luck, it took me ages to do this a very simple job, thanks Honeywell You are all welcome! It does seem to work ok. Remember the display is not backlit!
Date published: 2019-01-29
Rated 5 out of 5 by from Great item Fantastic price,easy to fit and install Highly recommended if your old thermostat is on its last legs
Date published: 2019-01-05
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