Category Archives: Air Conditioning

Replace Air Conditioner Compressor | HVAC Refrigeration

Replace Air Conditioner Compressor Decision | HVAC Refrigeration Question

Replace Air Conditioner Compressor | HVAC Refrigeration – Question – Richard – I am an HVAC technician and have read all of your articles on refrigeration and compressors. Great information and it has helped to hone my skills and offer better service for my customers. Thanks! I was wondering what your experience is with replacing compressors. How do you arrive at the decision to replace a compressor technically speaking of course? I look forward to reading your answer. Brett

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Air Conditioner Condensing Unit Frozen | HVAC Troubleshooting

Air Conditioner Condensing Unit Frozen | HVAC Troubleshooting

Air Conditioner Condensing Unit Frozen | HVAC Troubleshooting

Old Condenser

Richard – Early last month we turned our air conditioner on and it worked fine for a few days. Then I noticed it was getting a little warm in the house so I went around and checked the Air Conditioner. Of course I checked the thermostat first and then the air filter. I went up into the attic to look at the air handler. I did not notice anything out of the ordinary that I am not used to seeing but I am not an expert. Then I went out to the the condensing unit on the back patio and I saw some ice inside the condensing unit. The compressor and the all the pipes connecting to the compressor were a block of ice and frozen solid. I turned everything off and called the HVAC contractor I am used to dealing with. They told me they would send someone out to take care of it. A few hours after making the call I got a call from the technician. He told me there probably very little he could do for me now as we would have to let the ice melt before he could properly troubleshoot the problem. We agreed for him to come the next morning to check it out. He told us to leave the air handler blower fan on but make sure the condenser was off. He told me to go to the breaker box and turn the condensing unit off and use the thermostat for Fan Only operation. We did exactly as he said.

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Air Conditioner Components | HVAC Cooling

Air Conditioner Components

Air Conditioner Components | HVAC CoolingThere are big differences between heat pumps and air conditioners. While the air conditioner provides cooling the heat pump will provide heating and cooling so the components inside the air conditioner differ from the components inside the heat pump system. I constantly get emails from people asking if they can convert their air conditioner to a heat pump and of course they can but it is not recommended. I have even devoted an article to it for those who are considering converting their air conditioner to a heat pump.  After all, if you sit a heat pump next to a condenser it would be impossible to tell the difference from the air conditioner condenser to the heat pump condenser unless you looked inside the unit and was able to identify the different components from a heat pump to an air conditioner.  Here are the basic components of an air conditioner that make the air conditioner cool your home or business.

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Delay Timers and the Air Conditioner Condenser | HVAC Control

Delay Timers and the Air Conditioner Condenser - Unit with the top off - condenser fan motorDelay Timers and the Air Conditioner Condenser – Heat Pump Condenser

Air Conditioners are big HVAC refrigerators. Air Conditioners and Heat Pumps use the HVAC refrigeration cycle to transfer heat from a place where it is not wanted (inside absorbing heat with the evaporator coil) to a place that makes no difference (outside using the condensing unit)(in the cooling cycle). The heart of any HVAC air conditioning, heat pump, or refrigeration system is the compressor which pumps the refrigerant through the HVAC air conditioning system. When the refrigerant leaves the compressor it is compressed and therefore a higher pressure than it was before it entered the compressor inside the condensing unit. This pressure remains constant (give or take under certain conditions) until it passes through the metering device where the pressure and temperature are reduced. This low pressure remains constant (again give or take under certain conditions) until it again reaches the compressor inside the condensing unit and is compressed again.

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Air Conditioner Condenser Electrical Components – HVAC Cooling

air conditioner condenser electrical components

Air Conditioner Condenser Electrical Components

Air Conditioner Condenser Electrical Components – There are many electrical components inside an air conditioner unit. From relays to contactors to electric motors and wiring it has to work together and working properly for your air conditioner to run smoothly. It is almost like a ballet and the air conditioner sequence of operation follows a specific sequence to work properly  For the purpose of brevity the focus of this article will be on the condenser and the electrical components in an air conditioner condenser. From the disconnect box on the wall next to the condenser all the way through the control panel and into the components we’ll cover all the various electrical components and how they work together to make your air conditioner work.

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