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Yes Honeywell makes 2 wire battery controlled thermostats, some that look just like the old round ones of the past. I have a newer one on my pellet stove when the stove doesn't kick into high when bel …

If you only have a 2 wire thermostat it’s not the thermostat that needs to be changed. …

The thermostat wiring needs to be run to the location you want the thermostat or purchase a locking cover. …

If this is a non powered venter it would work with a battery backed up thermostat the power to run and charge the new thermostat can be installed then the normally open relay contacts in parallel with … the old thermostat. …

unocc1, occ2 and unocc2 , other than this there is a manual override of the fan schedule, so if it runs fine in heat mode but you don’t like the choice in cooling mode you will need to reprogram the thermostat …

The way “universal power” devices or devices with a 90-240v input range work is with a power supply called a switching power supply. These supplies take the available AC power and using electronics co …

You can install the old thermostat and although it won’t cost anything today loosing some of the features of a modern digital may be worth the expense. …

So your blacks hook up to the blacks on the thermostat The whites to the red wires of the thermostat The hot black to L1 the hot white to L2 You would not have confused your self if you would have labeled …

I use cycle timers all the time they do not draw much power from the 24 v supply and the contacts are the same as a thermostat if wired in parallel when the contacts close it is the same as the thermostat …

You have a line voltage thermostat it may work in place of a mercury but it may not if the contacts don’t have a low enough resistance. … Put L1 and T1 to the wires that went to the Mercury thermostat (normally red white). The reason this may not work is most gas valves are millivolt and used mercury thermostats very low current. …

Some power supplies have a large amount of dc ripple or don’t work with inductive loads. I am not sure about your tekmar unit it may be heavily inductive and that will cause the voltage to dive on a s …

Think of it as a double ended solenoid once it moves it stays there. O moves the valve from heat to cool and it stays there. B moves the valve from cooling to heating. This is better than having a sin …

If you cannot find a rating on the transformer I would not add the extra load. With small signal and control transformers it is best to have a “buffer” so you do not over heat it. Small transformers w …

The set point or thermostat is just a switch it has nothing to do with the heat in the system unless a high end one. …

In your case the thermostat on the heater will turn off once the temp is achieved that and your 1 hour timer will mean you save $ because while sleeping it will be off if you turn it on it will only be …