Type: Posts; User: paskos
Although the branding is York my guess is York had a partnership with Honeywell.
Thank you very very much ammoniadog for the info.
Kdean1, thanks a lot for your quick reply.
My system is dual-fuel: heat pump (york) and oil furnace. And the thermostat has an em heat switch.
Nest now supports (since 2nd generation) dual fuel...
We just bought a house.
This house has a fairly old dual fuel heating/cooling system (york heat pump and oil furnace) with a york thermostat using mercury.
I attached the picture of the...