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If the burner doesn't cycle on and off when set to 3 or 4 to control the heat then the thermostat is not working properly. …

Connect your thermostat to the center terminals and the boiler and the wood burner to each of the other pairs of terminals. Then switch back and forth to your heart's content. Good luck! …

Does the box fill calculation account for a device like this differently? No. The Code does not distinguish between particular devices. If the device is yoke mounted it requires a double volume …

Single pole stats don't because they don't need to. Just buy one of these and call it good: https://www.amazon.com/gp/product/B0028JJLSS/ref=oh_aui_search_detailpage?ie=UTF8&psc=1 Good luck!

I agree with @nomind as far as removing the panel on the furnace and inspecting the the blower. However, I am thinking the fan reaches a particular speed and the balance of it hits a resonant frequen …

Just a guess, but the colder it gets the longer the boiler cycles and the hotter the delivery water temperature gets so therefore the radiators get hotter before the thermostat shuts the boiler off. … In moderate temperatures, the thermostat shuts the boiler off before it gets very warm and so your radiators are barely above room temperature. …

If you would have shorted something badly the breaker should have tripped. I say "should" have as long as you have a quality breaker that is not corroded. I would definitely monitor the situation tho …

The thermostat can be used for this as long as it disconnects both ungrounded conductors and has a marked "off" position.) … If you had a triac based thermostat contact pitting becomes a non-issue and you can go back to breaking the circuit in one place. Good luck! …

“off” position (3) Designed so that the circuit cannot be energized automatically after the device has been manually placed in the “off” position (4) Located as specified in 424.19 So, you can use a thermostat … controlling the following: (1) Resistive and inductive loads not exceeding the ampere rating of the switch at the voltage applied So, the branch circuit must be sized 125% of the load but the switch or thermostat …

Just buy one of these. Less than $20 and they work on both 120 and 240 and have an "off" setting. Good luck!

The sensor is usually a 10K ohm Negative Temperature Coefficient thermistor and changes its resistance with temperature. It is not that sensitive to the electromagnetic interference from the power cab …

If you can verify that there is power to the condensing unit (outside unit) then you have done all most homeowners can do. The fan on your furnace (the thing in the basement) will come on any time th …