controls

How is it possible that my control transformer is dead and yet everything is still working? To test, the secondary was completely disconnected. It's humming. It's warm to the touch. No voltage. Just tested my multimeter. Laptop power supply is reading 20V DC. (Spec is 19.) The system is an...

Towards the end of last summer I was given a central AC unit. I had a friend of my dad (certified HVAC technician) install the unit. He supplied everything for the install, including thermostat (honeywell programmable). I remember in the process of the install he thought he may have to put a new...

Looking for help on installing a humidifier controller. If all I had was a thermostat and HVAC unit this would be easy since Aprilaire has easy enough install directions. The problem is that my home uses a Honeywell W8150 whole house ventilation controller. This initiates fan calls as well as...

Conditions: 1. 3 zone hydronic floor heating, 3 zone pumps, 1 primary pump. Lochinvar Knight 155 mod-con. Basement slab, 1st floor and 2nd floor (extruded plates, insulated). Oversized boiler because of drive-under garage that might get additional modine heater. And global cooling on the way...

I've been diligently sealing up air leaks in the A/C duct work in our unfinished basement, using high quality heavy duty foil tape. I've sealed up everything I can get to. What I've now noticed is that most of the remaining leaking air is coming from the damper controls (I guess that's what...