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Plumberpro, Home Appliance Technician
Category: Appliance
Satisfied Customers: 634
Experience:  Heating and hot water heating appliances experienced
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Hi, I have a honeywell cm900 room thermostat it has 6 programable

Customer Question

Hi, I have a honeywell cm900 room thermostat it has 6 programable time slots the fifth slot is programmed to come on at 6 pm at 22 Celsius and go off at 10 -30 pm my problem is the thermostat stops working at around 9pm and the room temperature starts dropping accordingly I have increased the shut off time to 11 pm but it has made no differance the rest of the time it works just fine .
Submitted: 2 years ago.
Category: Appliance
Expert:  Plumberpro replied 2 years ago.

Hi . just checking the manual


Hi . you may need to reset it . have you got the manual?

JACUSTOMER-6snaz1s7- :



Ok on page 3 it shows how to enter the installer mode. After you enter this mode , you need parameter 2,no. Display 1


I think what yours may be doing is optimisation.reaching the required temperature at a certain set time




Hi . how are you doing


Did you find it on page 3

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