The Honeywell Indicator Room Thermostat T6360 T6360b1028 (Ebay: https://www.ebay.co.uk/p/1804523840?iid=160931970480) is no longer setting the temperature for the boiler. The boiler is a Worcester Combi 241 Junior. I am assumingthat the thermostat is faulty. I do have, lying around, a spare salus digistat rt500bc (https://www.plumbarena.co.uk/product/salus-rt500bc-programmable-room-thermostat/). Could I either 1) Replace the existing thermostat or 2) Replace the existing thermostat with the Salus digistat?