Monthly Archives: May 2012

Air Conditioning Pressure Switches

It has finally gotten hot and it seems we are fully into air conditioning season (let’s hope it stays fo a while).  With air conditioning season comes a whole other set of diagnostics that we probably all have forgotten over the … Continue reading

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Guidelines for Service of Units with Microchannel Condenser Coils

With the introduction of Microchannel condenser coils, some service practices have changed from traditional copper tube and aluminum fin coils. It is important to understand that Microchannel coils hold a relatively small volume of refrigerant.  First thing to remember is … Continue reading

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Roof Top Unit Control Boards

Over the years, as technology changed and new products were introduced, we have made changes to the various control boards we have used in our roof top units. For many years we used a simple “lock-out relay” board — one … Continue reading

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Mobile APP for Android Phones

As I mentioned in my “anniversary posting”, we have an APP available for Android phones. Below it an html code so you can see what the app does before you down load it.  If you like what you see, you can … Continue reading

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York Hybrid System with Bonnet Sensor

York’s HYBRID system using our Affinity Modulating furnace and Affinity Heat Pump with the York Guard VI control, have a unique distinction of being able to run the heat pump simultaneously with furnace by simply adding a bonnet sensor between the … Continue reading

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O.E.M. Start Kits

As I mentioned in my last post, the reason most contractors do not use the OEM start kit is because they either don’t understand how it works or don’t know how to wire it into the circuit. First, let’s see … Continue reading

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Start Assist Kits vs. OEM Hard Start Kits

To start off, why do we even need start gear on a compressor in the first place? It’s a good question and I will try to answer it. A compressor is designed with a certain amount of starting torque which … Continue reading

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