HVAC Relays (For Beginners) 

Thanks so much. Always glad to hear my content is effective and helpful.

@@JerseyMikeHVAC the key is that you explain everything is a concise manner and more importantly, you are not trying to sell or endorse a product. Keep up the great work.

No problem! You're welcome.

Awesome. Thank you!

Thank you. I'll try to include a crack case heater in the upcoming schematic videos I'm doing and maybe even get into diagnostic readings with it.

Thank you. Glad it helped.

You're very welcome.

You are welcome!

You're welcome. I'm glad you found it too.

You are welcome!

You're most welcome

Thanks 👍

Thank you

Thank you too

Model number? Sometimes a regular relay can be used as a substitute, but I'd like to look at the schematic.

@@JerseyMikeHVAC Thanks for the quick reply Jersey Mike! It's an AirTemp Model # 42083C1421 Rev CA, Serial # DC427067 .

I can't find any documentation on it at all, even through Airtemp's archived manual base. Is there a wiring diagram still readable in the unit you can take a pic of and send to me? As well as the relay itself? mjrusso@protonmail.com Other than that, only other thing I can think of is to try to get in touch with Nordyne. They own Airtemp now and could possibly direct you.

Good possibility.

Typically in heating the lowest blower speed is used to maximize the amount of time the air can absorb heat as it passes through the heat exchanger, which can help keep down cycle times. With problem areas, medium speeds can sometimes be used to push a little more air to weaker vents but that doesn't always help and can sometimes even make things worse in a few cases. Usually, it is either a duct design issue or improper air balancing that blower speeds cannot easily overcome or correct by themselves.

@@JerseyMikeHVAC Thanks Mike that's very helpful in my upcoming project.. Thanks again Appreciate it.