It’s important to keep HVAC Tools Calibrated
…and not just for the “by-the-book reasons Here’s why it matters in the real world: Accurate diagnostics – Gauges, thermometers, manometers,…
Category: Technical Services
The new Carrier 27VPA9
This new unit is a noncommunicating variable 5 speed performance line heat pump with InteliSense technology, 19 seer2. Sizes range…
Wiring of a VFD Fan Board at the J1 and J2 Plugs to VFD drive and to CTRL board
When you get a new VFD drive and want to install it and you see that the other one was…
Troubleshooting Codes 25-XX
Have you worked on the new 20, 21, and 23 SEER2 units and encountered a fault code 25-XX (for example,…
The Importance of Reading the Installation Manual Before Installing HVAC Equipment
Installing heating, ventilation, and air conditioning (HVAC) systems require precision, knowledge, and attention to detail. While many technicians rely on…
Diagnosing and Correcting a Heat Pump That Will Not Enter Defrost
Imagine that you receive a call from a customer stating that their heat is not working. Upon inspection you find…
ICP Furnace Showing 80% Limit Fault
Most gas furnaces have several safety limits, main limits, roll-outs, 80%’s will have a DSS (Daft Safety Switch) These safety…
Indoor TXV Failure in Heat Mode
This article is in reference to Residential Heat Pumps. Everyone in the HVAC industry knows that the indoor TXV…
Compressors Problems & Troubleshooting
Compressors are the heart of the refrigeration system. It creates the pressure difference to move the refrigerant through the system.…
R-454B & R-410A Refrigerants: Are They The Same?
You have probably gone to classes, listened to podcast or read articles about the phase out of R-410A, and the…