HomeMatic HM-CC-RT-DN

Questions and Answers

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Russell ScottSep 10, 2025
What does 'Duty cycle exceeded' mean on HomeMatic Thermostat?
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  Don MartinezSep 10, 2025
  If your HomeMatic Thermostat displays 'Duty cycle exceeded,' the device will communicate again after one hour. No action is required.
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Lisa PetersonAug 22, 2025
What to do if CRC error after firmware update on HomeMatic HM-CC-RT-DN Thermostat?
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  Christopher ThomasAug 23, 2025
  If you encounter a CRC error after a firmware update on your HomeMatic Thermostat, repeat the firmware update.
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Angela RogersAug 25, 2025
How to fix low battery voltage on HomeMatic HM-CC-RT-DN?
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  thomasdavisAug 25, 2025
  If your HomeMatic Thermostat displays a low battery voltage warning, you should replace the batteries in the radiator thermostat.
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Kimberly SmithAug 27, 2025
What to do if HomeMatic Thermostat valve moved to error position due to low battery?
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  Shane OdomAug 27, 2025
  If the valve on your HomeMatic Thermostat has moved to an error position because of low battery voltage, replace the batteries in the radiator thermostat.
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Stephanie JacobsonAug 27, 2025
Why does my HomeMatic Thermostat show a low battery voltage?
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  Stephen PattonAug 28, 2025
  The HomeMatic Thermostat displays a low battery voltage when the batteries are depleted and need replacing. Replace the batteries of the radiator thermostat.
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Tara WilliamsAug 29, 2025
What to do if Teach-in procedure failed on HomeMatic HM-CC-RT-DN Thermostat?
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  Billy HuynhAug 29, 2025
  If the teach-in procedure fails on your HomeMatic Thermostat, restart the teach-in mode.
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Michelle BenderSep 18, 2025
What does 'transceiver module defect' mean on HomeMatic Thermostat?
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  jameskingSep 18, 2025
  If your HomeMatic Thermostat displays 'transceiver module defect', replace the device.
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wallsmadisonSep 12, 2025
Why is the valve drive on my HomeMatic HM-CC-RT-DN sluggish?
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  georgetimothySep 12, 2025
  If the valve drive on your HomeMatic Thermostat is sluggish, check the installation and whether the pin on the heating valve is stuck.
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melissa92Sep 8, 2025
What to do if HomeMatic HM-CC-RT-DN Thermostat teach-in fails because no more devices can be taught-in?
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  Molly SchroederSep 8, 2025
  If the teach-in process fails because no more devices can be taught-in, perform the teach-out function.
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julie50Sep 5, 2025
What does it mean when HomeMatic HM-CC-RT-DN Thermostat indicates low voltage for taught-in devices?
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  Shawn HowardSep 5, 2025
  If your HomeMatic Thermostat indicates low battery voltage for one or more taught-in devices, replace the batteries of the taught-in device.

HomeMatic HM-CC-RT-DN Specifications

General

Type	Radiator Thermostat
Manufacturer	eQ-3
Model	HM-CC-RT-DN
Radio Frequency	868.3 MHz
Display	LCD
Valve Connection	M30 x 1.5
Protection Class	IP20
Compatibility	HomeMatic System
Communication	Bidirectional
Power Supply	2 x 1.5 V AA Batteries
Humidity Range	non-condensing