Mothers central heating had a Honeywell Y6630D Wireless Room Thermostat with Honeywell ST9100C1006 7 day time switch house occupied all the time so timer set to constant and thermostat was altered daily down when going to bed and back up in the morning.
I have replaced them with a Horstmann HRFS1 Programmable Room Thermostat which is actually less than half the price of the previous pair and this allows 5 settings per day repeated for every day of the week so once set auto 17°C at night 21°C during the day except for her regular times out of the house where it drops to 17°C. Great result was when asked are you warm enough answer was "I did not think about it." About the best reply I could get clearly all works A1.
So why do plumbers fit Honeywell Y6630D Wireless Room Thermostat with Honeywell ST9100C1006 7 day time switch. Over twice the price and does not do as good of a job. I am sure there must be a reason? But I can't work it out.
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