Name: Infinity® 20 Air Conditioner with Greenspeed® Intelligence
Brand: Carrier
Availability: InStock

11 years ago I (Bryan) walked into my local Carrier and asked to be signed up as a dealer. From that time until now Carrier and now Carrier Enterprise have worked to support us in our business through training, marketing programs and personal care when we needed help. We are especially thankful to Carrier for partnering with HVAC School to bring high quality, free training to men and women across the USA who need it now more than ever.

Products We Love

Infinity® 20 Air Conditioner with Greenspeed® Intelligence

Up to 20.5 SEER for premium energy savings with premium comfort features.

Carrier OptiClean™ Dual-Mode Air Scrubber & Negative Air Machine FN1AAF

600 - 1500 CFM

ecobee3 lite Pro

The ecobee3 lite, Powered by Carrier, tailors itself to your schedule, your personal comfort preferences and the weather outside.

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Check out our most recent video

How to Evacuate an AC system, Full Vacuum Procedure

Our latest Podcast

HVAC School – For Techs, By Techs

Real training for HVAC ( Heating, Ventilation, Air Conditioning and Refrigeration) Technicians. Including recorded tech training, interviews, diagnostics and general conversations about the trade.

In this short Q&A podcast episode, Bryan answers a listener-submitted question about circuit board troubleshooting: is there a quick way to learn how to check circuit boards, and if so, where are those resources?

A circuit board is a bunch of components put together on a printed circuit board (PCB). There isn’t a lot of helpful universal information about circuit boards available, as they vary quite a bit by model and manufacturer. However, many of the basic components will be the same across circuit boards: microprocessors, diodes, relays, capacitors, and transformers. If you understand what these are on their own, that will help you understand what they do in circuit boards.

You mostly need to know the inputs, outputs, and sequence of operation of a circuit board to diagnose it. The sequence of operation tells you when certain things are supposed to happen, such as in an integrated furnace control (IFC); the flame rectification process is a classic example. If the flame can be proven, the operation continues; if it can’t be proven, then that will cause a lockout (possibly due to improper grounding or poor placement and NOT necessarily because of the board).

A lot of issues with the board can be diagnosed if you understand the inputs and outputs (e.g., 24v signals) or observe it with your senses, such as bloated capacitors or ant nests. Becoming a master of the obvious and checking the manufacturer’s literature are the top two things you can do to diagnose circuit boards.

HVAC Control Systems by Ronnie Auvil

Electricity for Refrigeration, Heating, and Air Conditioning by Russell Smith

Have a question that you want us to answer on the podcast? Submit your questions at https://www.speakpipe.com/hvacschool.

Purchase your tickets or learn more about the 6th Annual HVACR Training Symposium at https://hvacrschool.com/symposium.

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