Relay story.
Compressor on my heat pump wasn't coming on but I could hear the relay/contactor clicking. Turns out a Palmetto Bug (roach for you northerners) had inserted itself between the contacts and committed suicide -- effectively blocking the current flow. New one was about $15 on Amazon.
Compressor on my heat pump wasn't coming on but I could hear the relay/contactor clicking. Turns out a Palmetto Bug (roach for you northerners) had inserted itself between the contacts and committed suicide -- effectively blocking the current flow. New one was about $15 on Amazon.
About relays. The guys online who were helping my fix my heat and cool system were saying it might be a relay. I was skeptical, but yep, it was the relay.
I had time, being retired, so I was able to carefully take things apart, and replace the relay in the air handler and get the fan motor to come on again. One set of contact points was 'worn out' as in corroded from decades of electricity arcing over them each time they closed.
I learned a lot about testing electrical components.
I was surprised to find that there were lots of websites selling the original equipment relay (vintage 1986). It was a Trane part that they used and still use in lots of their stuff. I tried to get a generic $10 relay, but nothing quite fit in well enough, so I went 'BTD' and bought an OE relay for $44 including shipping.