The Danger of Carbon Monoxide
Carbon Monoxide is a colorless, odorless, tasteless gas that can be extremely dangerous and even deadly. Because you cannot see…
Category: Technical Services
Diagnosing and Fixing Fault Code 44 on FE4 or FE5 Infinity Evolution Fan Coils
Have you ever had a fault code 44 on a FE4 or FE5 infinity or evolution fan coil? Do you…
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,…
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…
