We have been discussing many methods for checking a refrigerant charge without connecting gauges over the last few months. This got me thinking about the “approach” method of charging that many Lennox systems require. The approach is simply how many degrees warmer the liquid line leaving the condenser is than the air entering the condenser. […]

If you own an HVAC or refrigeration business, there may be times when you think giving a discount might be the right thing to do. Maybe you have a friend who’s having a hard time and suddenly has an evaporator coil leak that needs attention. You may consider offering him a discount to help him […]

That picture above is a WW2 poster reminding soldiers of informed self-interest, which is something we ought to consider when making decisions. We live in a world where we often make decisions quickly and expect to see quick results. That works whenever I buy from Amazon. I order a new belt, and it shows up […]