Well-known industry author and instructor Jim Johnson is offering a new video for technicians who want to sharpen their troubleshooting skills. "This HVAC training video program, is available in DVD ...

Find the disconnect switch to your air handler or furnace, and switch it off. This will be located near the unit. Shut off the circuit breaker at your home’s electrical panel if you can’t find the ...

For electricity to flow, everything needs to be connected in a big ring. It’s called a circuit. For example, the lights in most houses and flats are part of a circuit controlled by the consumer unit, ...

For electricity to flow, everything needs to be connected in a big ring. It’s called a circuit. For example, the lights in most houses and flats are part of a circuit controlled by the consumer unit, ...

Article 300 is one of four Articles that form the basis for applying Chapter 3 wiring methods (the other three are Art. 310, Art. 312, and Art. 314). The requirements of Art. 300 apply to all Chapter ...

Have you ever had a trailer’s electric brake or lighting systems not operate properly and weren’t sure where the problem originated? It could be the result of an electronic brake controller, ...

Achieve max electric fuel pump output and safety using a relay plus an oil pressure safety switch. Achieving maximum output and safety with a custom-wired electric fuel pump requires a properly ...