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Honeywell CM901 Room Thermostat (39124)

Electronic sensing element. 3-wire installation. Override facility. Holiday mode. Automatic BST/GMT time change.

  • Digital Display
  • 6 On/Off Periods per Day
  • 1 Pre-Set Programme
  • 24 Hour Programmable
  • 3 Wire Installation
  • Frost Protection
  • Override Facility
  • Holiday Mode
  • Automatic BST/GMT Time Change
  • 1 Year Guarantee

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£69.99INC VAT

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Honeywell CM901 Room Thermostat is rated 4.1 out of 5 by 13.
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Rated 5 out of 5 by from Excellent temperature control I used this to replace an old mechanical thermostat. Only took 10 mins to fit. Programming is very easy - the on-screen messages are excellent. I especially like the Optimization feature - very clever!
Date published: 2017-02-24
Rated 2 out of 5 by from Unreliable Unlike the other reviews, I could not recommend this unit I have had two of these and both failed for the same reason - garbled displays. I noticed that one of the other reviewers bought a second one because the first lost digits on the display. While it worked it was OK, though too fiddly and complicated to set up with features that most folk wouldn't use. Unfortunately, as usual, both were outside the short 12-month warranty.
Date published: 2016-11-07
Rated 5 out of 5 by from Excellent performance I bought this thermostat as a replacement for an identical existing unit. The previous one started losing some parts of the characters on the LCD display after 5 years service. Despite this, I bought another one simply because the performance of this thermostat is in my opinion the best for demostic application. My house tempreture is spot on the set desired temperature and always comfortable summer or winter (no overshoot). I tried different makes and types and this model has been outstanding. I have a Heat Pump heating system all the year round with back up Gas Boiler boost during the very cold periods. The CM901 has a features which control the heat pump's on/off cycling to its optimum working performance. The same exist for the gas boiler.
Date published: 2016-09-23
Rated 5 out of 5 by from CM901 Room Stat No frills room thermostat. Simple to install. Looks very tidy and has a large LCD screen so even in the dimmest light its easy to see. For the price, it's a good piece of kit.
Date published: 2016-06-17
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Is this thermostat timer suitable for electric (dry) underfloor heating?

Asked by: DJMH

I have one of these but it has been dropped and is malfunctioning.How easy is it to get a new controller connected to an existing base unit?

Asked by: sean44
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Specification
Brand Honeywell
Central Heating Control Type Thermostats
Compatible Boiler Type All Boilers
Display Type Digital Display
Installation Type 3-Wire Installation
Manufacturer Guarantee 1 Year Guarantee
Manufacturing Standards Building Regs Compliant,
Model No CM901
Pack Size 1
Pieces in Pack/Case 1
Product Depth 26 mm
Product Height 89 mm
Product Type Room Thermostat
Product Width 133 mm
Programme Facility 24 Hour Programmable
Temperature Range 5-30 °C
Total Product Weight 0.21 kg
Zoning Level One

Switch/contact rating: volt free (switches 24-230V). Temperature range: 5-30°C. H x W x D: 89 x 133 x 26mm. 2 x AA batteries supplied.

Downloads

Instruction Manual