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A Great Super Fantastic Book for Learning How to Service and Repair Air Conditioners and Heat Pumps

My friend, Craig Migliaccio just finished this great book on Refrigerant Charging and Service Procedures for Air Conditioning. If you would like to see more information on the book or purchase here is the link https://www.acservicetech.com/the-book Mr. Migliaccio has dedicated many hours to this excellent book and has been kind enough to make hundreds of Youtube repair and troubleshooting videos. We feature many of these videos taken from the AC Service Tech Youtube Channel on our site! “This book is dedicated to those who are eager to learn the HVACR Trade and Refrigerant Charging/Troubleshooting Practices. In this book, you will find step by step procedures for preparing an air conditioning and heat pump system for refrigerant, reading the manifold gauge set, measuring the refrigerant charge level, and troubleshooting problems with the system’s refrigerant flow. This book differs from others as it gives key insights into each procedure along with tool use from a technician’s perspective, in language that the technician can understand. The book also explains the refrigeration cycle of air conditioners and heat pumps, refrigerant properties, heat transfer, the components included in the system, the roles of each component, airflow requirements, and common problems.”

Procedures Included are:

  • Pump Down
  • Vacuum and Standing Vacuum Test
  • Recovery and Recovery Bottle use
  • Refrigerant Manifold Gauge Set and Hose Connection and Disconnection
  • Service Valve Positions and Port Access
  • Preparation of the System for Refrigerant
  • Refrigerant Charging and Recovery on an Active System
  • Troubleshooting the Refrigeration Charge and System Operation.

 

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Top 12 Problems and Mistakes when installing or replacing thermostats!

We have been getting lots of questions about how to install thermostats properly. Many questions are about why my newly installed thermostat is not working properly.  I found this excellent Youtube video from AC Service Tech that shows what the top 12 problems and mistakes are when installing or replacing thermostats.  I hope this helps you when installing or replacing a thermostat. Thanks so much to AC Service Tech for making this excellent video! We would love to help you out and earn your business!  Please email us anytime if you have questions. Support@arnoldservice.com

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Problem: AC Unit Not Turning On-How to Fix it.

troubleshooting air conditioners and heat pumps

Problem: My air conditioner will not turn on. What could be the problem with my AC not turning on?

Answer: I found this excellent YouTube video from Word of Advice TV that explains many problems that can cause your Air Conditioner to not work or come on. This is one of the best videos I have ever seen on troubleshooting an air conditioner. I hope this helps you find and fix your air conditioner or heat pump system. If you have any questions please respond in the comments below or email me Steve Arnold at: Support@arnoldservice.com. Thanks so much for giving us the opportunity to serve you! Hope you have a blessed day! Steve

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Top 10 Air Conditioner Service Call Problems

troubleshooting air conditioners and heat pumps

Many people have trouble troubleshooting and finding out what is wrong with their air conditioner when it does not work. I found this excellent Youtube video from Word of Advice TV that shows what are the top 10 air conditioner service call problems. I have the video below. I have the problems listed below the video.  You can see that many of these problems can be easily fixed and are easy inexpensive problems.  I counted 17 top problems and 9 honorable mention problems. I hope this helps you find and fix your air conditioner’s problem. We would love to help you out and earn your business. Please email us anytime if you have questions. Support@arnoldservice.com

  1. Bad Capacitor. Please click here to see the capacitors we sell.
  2. Refrigerant Leaks
  3. Plugged or stopped up condensate drain line. If you have a condensate pump make sure the pump is working and the condensate pump safety switch is not open.
  4. Bad control board on furnace or heat pump.
  5. Bad condenser fan motor. Please click here to see the condenser fan motors we sell.
  6. Bad blower motor or bad blower motor capacitor. Please click here to see the blower motors we sell.
  7. Compressor shorted to ground. (will need a new compressor).
  8. Dirty furnace filter
  9. Tripped AC Breaker (If your AC is not coming on I would suggest turning the breaker completely off and back on again to make sure the breaker is on. Do not touch anything metal on your circuit breaker box for safety).
  10. AC completely out of refrigerant (Freon).
  11. Dirty Condenser Coil
  12. Bad Contactor. We sell contactors on the following page: Please click here to see the contactors we sell.
  13. Drain pan coil leaking water.
  14. Mouse or insect damage in the control box.
  15. Broken or loose wires.
  16. Locked Rotor on compressor. Might use an SPP6 to unlock compressor. Please click here to see the SPP6 compressor hard start booster we sell.
  17. Inefficient Compressor where the valves are blown on the compressor.

Honorable Mention Problems:

  1. Furnace switch turned off on the side of the furnace.
  2. Blown AC disconnect fuses.
  3. Evaporator Coil completely clogged with lint and dirt.
  4. Restricted metering device. Either restrictor pin orifice or TXV stopped up or not working properly.
  5. Cracked condenser fan blade.
  6. Thermostat bad or thermostat batteries bad.
  7. Low voltage transformer bad. Please click here if you are interested in the low voltage transformers we sell.
  8. Door safety switch on furnace not pushed all the way in. Furnace blower door is loose.
  9. Vandalism where someone intentionally did something to cause the AC unit not to work.
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Why is my new heating and air conditioning system not heating and cooling my house properly?

troubleshooting air conditioners and heat pumps

We have this questions asked many times over the years and I want to post my response to this frequently asked question: I am so sorry to hear that you have spent all this money and still do not have a furnace and air conditioner that are working properly! I have this problem asked many times over the years and my answer is:  I would strongly recommend that you have your HVAC contractor do a Manual J Heat Gain and Heat Loss calculation on your home before installing a new furnace or doing any other work. We are required here in Louisville, KY to submit a Manual J calculation to the Housing Department, Code enforcement before a permit will be issued to start a new installation. Without the Manual J calculation, it would be a guess as to what size equipment needs to be installed and this is why many people get the wrong size equipment. Requiring a heat gain, heat loss calculation protects the homeowner from getting the wrong size HVAC equipment installed. Most companies have a Manual J computer program where they enter the required information like the home’s orientation (facing north, south, etc.) the amount of insulation, window types, door types and all surfaces that gain or lose heat and more. The computer program will figure the amount of heat loss and gain and tell the contractor what size HVAC equipment needs to be installed.  I would recommend that you get this Manual J calculation completed for your home so you know for sure that you are getting the right sized HVAC equipment installed. Even though it is a pain and extra expense for the homeowner and contractor this insures the right size equipment is installed and is invaluable for protecting your energy bill and comfort. We have many other air conditioning and heat pump troubleshooting pages. Please click here to see more troubleshooting advice. Please click here to see the many name brand air conditioner and heat pump repair parts that we sell. We would love to answer your questions and earn your business! If you have any questions please email us anytime: Support@arnoldservice.com

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Problem: Why is my fan blower motor running all the time?

Problem: We have many people ask, “Why is my fan blower motor running all the time. My blower motor will not shut off?” “Why does my fan motor run continuously when I use my furnace?”

Answer: I found a real good Youtube video made by ACServicetech that explains 4 reasons why fan blower motors run continuously. In this video ACServicetech goes over why the Blower Fan Motor Won’t Shut off/Continuously Runs and some of the most common reasons why furnaces or air handlers have this problem. ACServicetech shows step by step Troubleshooting on how to figure out what is causing this problem. This is a great video that I would highly recommend that you watch  if your fan motor is running continuously. Many thanks to ACServicetech for making this informative video! If you have any questions please feel free to email us anytime or respond in the comments section below. We have many heating and air conditioning troubleshooting links, Videos and Resources on the following page: Please click here for more troubleshooting resourcesWe would love to help you out and earn your business! Our email address is: support@arnoldservice.com

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Top 10 Reasons Why the Blower Fan Motor will not come on. Furnaces, Air Conditioning and Heat Pumps

Questions: We have many people ask, “how can I find out why my fan blower motor is not working?” “Why does my fan motor not work when I turn on my furnace or air conditioner?”

Answer: I found a real good Youtube video made by ACServicetech that explains the top 10 reasons why fan blower motors will not come on. ACServicetech goes over what to look for in the system, components that fail most often, how to test the components, where to take readings with a multimeter as well as other tips! This is a great video that I would highly recommend that you watch  if your fan blower will not come on. Many thanks to ACServicetech for making this informative video! If you have any questions please email us anytime. Our email address is: support@arnoldservice.com. We would love to help you out and earn your business!

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Fuse on my control board blows constantly. How do I find a Low Voltage Short?

troubleshooting air conditioners and heat pumps

We have many customers ask how to find a low voltage short when the low voltage transformer is burning up or the fuse on the control board constantly blows? Most of the time I have found that shorts occur in the thermostat wires that go out to the outdoor condensing unit. Wear and tear of sun light, animals or weed eaters usually cause these shorts. I would suggest inspecting the thermostat wires for cracks, wear and tear. Pay close attention to where the thermostat wires go through the body of the furnace or air conditioning unit. Many times the thermostat wires will short out against the body of the furnace or air conditioner. I found this real good Youtube video on how to find low voltage shorts by ACservicetech. I hope this great Youtube Video will help you out in finding where the short is located. Thanks so much to ACservicetech for making this great video! If you have any questions please email us anytime: support@arnoldservice.com

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What does the word, “Protected” mean on an air conditioner run capacitor?

troubleshooting air conditioners and heat pumps

We had this question asked this week by a potential customer and I did not know what the word, “Protected” on air conditioner run capacitors meant until I researched it on the Internet. Our customer’s question was the following:

“The AC (Carrier) in our vacation home failed and needs a replacement. The original has the word PROTECTED stamped on its metal  wall. I  found a local supplier that has a new Capacitor that has the same  spec except it does not have the PROTECTED  stamp. My question is what does Protected entail and is it an essential when replacing a Capacitor.” 
My answer: I really did not know what “Protected” meant until I started researching on the Internet and found the following answer on the HVAC Talk website. I opened a few of the capacitors that we sell and all of them say, “Protected” on them. The Titan Pro capacitors we sell say, “Protected 10,000AFC“. The following is what I found when I Googled the topic: “Its a safety rating. Some capacitors are designed so that if the cap short circuits and starts building up pressure inside the can the terminals will disconnect themselves from the internal connections to the cap plates. This opens the circuit before the can can burst or explodes.
When you see the top of a capacitor can bulged out you can see that the terminals and plates inside the capacitor have pulled away from the plate connections in the can.  I think circuit breakers carry the same ratings…..”

 
I would think that it is important to have a capacitor that has “protected” on it so it does not damage your equipment. If a capacitor is not protected then it could short out and damage other controls in an air conditioning system which could be very costly. All of the capacitors that we sell have “Protected” stamped on the body of the capacitor. We sell many different capacitors on the following page: Please click here to see the capacitors we sell. Thank you so very much for asking this question! This was a learning experience for me! Thanks! Steve Arnold
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My furnace / air conditioner cooling coil under my house is causing water to puddle up on the ground. What will cause this to happen and what do I need to do to fix it?

troubleshooting air conditioners and heat pumps

Water under the cooling coil can be caused by several things. (1) Most of the time it is caused by a stopped up condensate drain line and you should be able to blow compressed air through the line or take a wet vac and suck on the end of the condensate line to clear the clog. In severe cases sometimes the condensate line has to be cut with a saw or PVC cutter to remove the clog. I have also had to remove the evaporator coil covers to get to the coil drain pan and drain pan opening in order to clean the coil drain pan and condensate drain opening with a wet vac to get the coil drain unstopped and clean the coil drain pan while I have the evaporator coil open. I would suggest testing the coil drain pan with water by pouring water into the coil drain pan with a cup or bottle to make sure the drain is open before closing the evaporator coil back up.  (2) Sometimes coil drain pans develop holes and you would need to repair the leak in the pan by using epoxy of silicone caulk. I would try to make sure the condensate drain line is open before checking to see if the evaporator coil drain pan is leaking. If the condensate drain line is open and you are not getting any water or not much water out of the condensate drain then more than likely you have a hole in the condensate drain pan. I have tried to repair the pans before with epoxy and silicone, but most of the time this fix will only last one or two years. If you have a leak in the evaporator coil drain pan I would recommend replacing the entire coil. Repairing the drain pan can be time consuming and like I said usually does not last long because the coil pan has probably deteriorated in other places. Most of the time the entire evaporator coil has to be removed to do the repair. I some cases I had my sheet metal man make a new coil pans, but removing the old coil with all the movement, screwing on a new coil pan and heating the refrigeration lines to reinstall the coil after the new pan has been installed can cause refrigerant leaks. In my opinion after many years it is best to get a whole new evaporator coil and be done with it. (3) water on the floor around an evaporator coil or furnace can also be caused by a system being low on refrigeration charge and freezing up because of being low on charge or having poor air flow. Most of the time if a coil freezes up it is caused by a low charge, but I have seen cases where a dirty filter, dirty evaporator coil, or slow blower motor (might need a new motor capacitor) have caused evaporator coils to freeze up melt and cause water on the floor. If your coil is freezing up I would suggest checking anything and everything that could cause poor air flow across the coil and if everything is clean call a service tech to check the refrigeration charge in your air conditioning or heat pump system. I hope I have given you some things to look for if you find water on the floor around the furnace or under the air conditioner air handler. If you have any other questions please ask anytime. Our email address is: support@arnoldservice.com