Yes it can be done... Many folks use a digital Hunter from Walmart to make the upgrade. I haven't done it since I don't use our propane furnace for heat; I use a half-height (fits under the bed for storage) oil filled radiator with a digital thermostat "for holding the temperature" (quiet, no fans) and a Pelonis disk, fan forced radiant heater for rapidly bringing up the temperature. Saves on burning my propane while using their electricity instead
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