Jun 116 minCharging a System in a Dry Climate? Consider a TXV and Accumulator!In a dry climate, certain considerations must be taken prior to installing or servicing air conditioning systems. A TXV metering device a...
May 288 minHow NOT to Check the Refrigerant Charge!There are many ways that technicians have tried to get around actually checking the charge of air conditioners and heat pumps with superh...
May 206 min10 Reasons Why a Mini-Split Ductless Flare May Leak Refrigerant!On a mini-split ductless system, two copper tubes are needed to transport the refrigerant. These copper tubes are referred to as the line...
May 611 minChecking the Charge of a Mini-Split Unit!A question that I get asked frequently is “Can I check the charge of a mini-split ductless unit with superheat and subcooling the same wa...
Apr 229 minWhy Can’t You Just Measure Pressures to Check a Refrigerant Charge?Most technicians in the HVAC field know the normal range of operation for the low-pressure side of an air conditioning system. This tends...
Apr 1610 minUsing the Total Superheat Charging Method for HVAC Units!In this article, we will define both superheat and total superheat, calculate total superheat, explain how to use total superheat to chec...
Apr 87 minThe HVAC Subcooling Charging Method, Explained!In this article, we will define subcooling, calculate subcooling, explain how to use subcooling to check the refrigerant charge, and show...
Mar 316 minTop 10 Thermostat Related ProblemsRegardless of the type of system or brand of thermostat, it is important to understand that there are many issues that can prevent a ther...
Mar 255 minHVAC DELTA T (ΔT) Explained for Air Conditioners!Delta T is a term that gets thrown around in the HVAC field quite a bit, but what does it really mean, what is its purpose, and does it r...
Jan 282 minFilter Drier, Solenoid Valve and Liquid Line Sight Locations in a Refrigeration SystemThe filter drier, solenoid valve, and liquid line sight have unique responsibilities in an automatic pump down refrigeration system. To u...
Jan 83 minTop 4 Reasons Why a Gas Furnace Short CyclesShort cycling means a gas furnace is running through its full sequence of operation for heat, it is providing heat in the building, and t...
Dec 26, 20195 minHow the Gas Pilot Light Functions and 10 Reasons Why the Pilot Light Goes Out or Won’t Stay Lit!Pilot lights can be found on furnaces, water heaters, fireplaces, ranges, ovens and other appliances. First, let’s discuss how the pilot ...
Oct 10, 20195 minNewer Methods that Make us Better Techs and Reduce Labor and Frustration! Top 15!Newer or faster methods do not always require expensive tools but do require a certain tool setup and step by step procedure. Some of the...
Sep 24, 20196 minUnderstanding Triple EvacuationThe triple evacuation is meant to be a means of dehydrating refrigerant tubing in a system that has high water content before refrigerant...
Sep 12, 20194 minCan you Braze Mini-Split systems instead of Flaring them?I have been asked, “Can we braze mini-split systems instead of flaring them?”. The answer, technically, is yes. The only question is in a...
Sep 2, 20196 minDetermining the Cause of a Liquid Line Restriction Problem!First of all, a liquid line restriction problem can be confirmed by measuring the following before the evaporator coil freezes: Low Vapor...
Aug 27, 20193 minMeasuring a Liquid Line Restriction Problem!The metering device is a purposeful restriction in the liquid line prior to the evaporator. The metering device is needed to lower the pr...
Aug 21, 20193 minTroubleshooting an Air Conditioning System with a Frozen EvaporatorWhen arriving on-site to a frozen evaporator coil and suction line on an air conditioner, you should be aware that at least one of the th...
Apr 19, 20193 minShould I Check the Refrigerant Charge with Superheat or Subcooling?If the outdoor unit has a single speed or two speed compressor running in second speed and the unit is not a Micro-channel coil, then Tot...
Apr 18, 20193 minTesting CapacitorsAn HVACR capacitor can be tested after turning the power off, disconnecting the wiring, and bleeding off any leftover voltage before test...
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