Arkansas HVACR NewsMagazine March 2025

HVACR NewsMagazine March 2025

Tech News

Building the Thermostat Training Setup

HVAC Training For Thermostat Operation, Wiring, & Multimeter Use! This short project is designed to show how to teach thermostat operation and wiring to a newer HVAC technician or a student in a mobile and easy to understand format. This particular project covers how a thermostat controls a gas furnace and air conditioning system. This can be accomplished using only a few simple items such as a basic thermostat, a small section of 18-5 or 18-6 (18 gauge, 6 colored wires) thermostat wire, and a multimeter.

For this example, we are using a basic non programmable, battery powered thermostat, capable of controlling a single stage furnace with one stage of cooling. However, any thermostat can technically work for this as long as it can be powered by batteries and can control a furnace and AC unit. The setup and parts are listed below: • (Multimeter) UEI DL489 Multimeter: https://amzn.to/3O9uu1Q • Multimeter leads with/alligator clips: https://amzn.to/3DrEkpT • Alligator Jumpers- https://amzn.to/2PxqJXn • 18-6 Thermostat Wiring: https://amzn.to/3rmY7E1 • (Thermostat) Honeywell TH1110D2009 T1 Pro Non-Prog: https://amzn.to/3qfgv18 Parts Required

Why Does Thermostat

Training Matter?

Understanding Electrical Resistance Measurements

Turn on the multimeter and set it to electrical resistance in ohms (Ω=ohms). With the two multimeter probes not touching and separated by the air, the measurement should be 0.L, indicating "Open Line". This is seen in

Understanding how a thermostat works and how it controls an HVAC system is critical for all levels of technicians. The technician/student needs to learn which wires the thermostat is supposed to connect at any given time. This knowledge can be achieved quickly because thermostats are simple in design and they act as nothing more than a set of switches with a digital display. Having a well-defined understanding of thermostat wiring and thermostat troubleshooting allows you to perform quickly and efficiently on the job!

the pic. This means that the circuit between the two probes is open.