On Saturday, July 1, 2017 at 8:21:46 PM UTC-5, rbowman wrote:
On 07/01/2017 03:18 PM, Uncle Monster wrote:
On a split system, there is a crankcase heater that's hooked across the 240 vac line at the contactor and is always energized. If one leg of the 240 volt supply is disconnected for some reason such as a defective breaker, a loose or burned off connection anywhere past the breaker, a high impedance meter will read 120 vac to ground/neutral from each side because one leg is feeding through the crankcase heater which is nothing more than a big resistor. A crankcase heater is either a cartridge in a well in the crankcase or a strap that resembles a big hose clamp with a flexible heating element that wraps around the base of the compressor. To go off on a tangent, some systems supply a low current to the motor windings to keep the compressor warm but you don't run across them very often.

Shows what I know about central A/C. But then, I've never had A/C,
central or otherwise, in anything but cars. By choosing not to live in
Alabamistan I've avoided a number of things. 300% humidity, chiggers,...


It was 90°F today and late this afternoon I was rolling around the complex to get my exercise. I rolled outside for a few minutes to see if I could slice the humid air with my hand. When I opened the door, I heard the call of summer, the cicadas were going wide open announcing to the world that they were horny.
ヽ(ヅ)ノ

[8~{} Uncle Bug Monster