transformer

My honeywell wifi thermostat went blank while my heater was running yesterday and now I can't shut off the heater unless I unplug the York furnace. Here's what I've checked so far but still can't figure out what's wrong and the cause of my blank thermostat. Would appreciate if anyone can give...

I want to add a ("smart") doorbell to my house which was built in the 60s without a doorbell (back when knocking was good enough). There is a 2-gang switch box by the door (controlling the exterior and interior entryway fixtures). My thought is to tap the power from the switch box (where...

I purchased an air purifier printed 110V. It has a power adapter of 100-240V. Can I use the air purifier with a power supply of 220-240V? Is the adapter also a converter or transformer? I’m really confused.

Hi all, I currently have a single 24 V transformer powering 2 Taco zone valves. The transformer is marked as "40 VA", which means it has a current rating of 1.66 Amperes. The problem is that I believe my Tacos have the older 0.9 A power heads; not the modern 0.3 A heads. If that's true, that...

I have six wires going to my thermostat. Only five are used. I need to connect my Blue wire to Common 24V to power my new Honeywell RTH8580WF1007 Wifi thermostat. With the old thermostat, this is the wiring: First transformer, only two wires: Heat White - W Heat Red - Rh Second Transformer...

Hey everyone I recently bought a Bradford White kit for my power vent water heater. the universal kit # is 265-47200-00 which is what BW techs told me this for a new blower since the bearings were going out of my old one so I ordered the kit and received it and have got most everything done but...