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How to Use a Multimeter to Troubleshoot HVAC Problems.

Problem: We have many people and potential customers ask us to try and help troubleshoot their furnace and air conditioning systems without the use of a multimeter. In many cases, I suggest that people purchase a low-cost multimeter so they can find the problem. As we all know electricity, which is the flow of electrons in a conductor can not be seen so a multimeter is essential for troubleshooting HVAC systems. We sell multimeters on the following pages: the Fieldpiece SC260 Clamp Multimeter , The Ames Pocket-Sized Digital Multimeter Capacitor Tester, and UEi DL389B G2 Phoenix Pro Plus True-RMS AC Clamp Multimeter (With Temperature)

Solution: Purchase a good multimeter and learn how to use it. Below we have two really good YouTube videos on “How to Use a Multimeter”. The first video made by Word of Advice TV is very detailed and shows all the Multimeter functions and how to use the meter to test components on an HVAC System. The video made by AC Service Tech near the bottom shows a shorter version on how to use the Multimeter and test components. We have the G2 Phoenix Series Multimeter like what is used in the YouTube Videos for sale on the following page: UEi DL389B G2 Phoenix Pro Plus True-RMS AC Clamp Multimeter (With Temperature)  We hope these two videos help you to learn how to use a Multimeter. Thanks so very much to Word of Advice TV and AC Service Tech for making these two informative videos! I you have any questions please let us know by commenting below or emailing us. Our email is support@arnoldservice.com. We would love to help you out and earn your business! 

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Why is it Important to Know Your HVAC System’s Static Pressure!

Problem: We had a person send us an email this week who had an 8-year-old heat pump compressor burn out. He wanted us to post on our site the importance of having your HVAC company check the static air pressure in your duct system. The company that installed the new heat pump unit said the reason the compressor burned out was that it was due to the lack of return air in the ductwork. Our customer said, “WOW… how many HVAC companies have worked on my unit>>> TOO DARN MANY… and NO ONE even said or checked my return air static pressure. Steve, make sure you tell people about how important is it to have their static pressure checked.”

Solution: If you are having a new HVAC system installed or if you are having airflow problems with your furnace, air conditioner or heat pump system then it is very important to have your HVAC company do a static air pressure test to make sure that your ductwork is sized correctly and you do not have restrictions in your furnace or ductwork that are causing airflow problems. This is why it is important to not have a furnace filter that is too restrictive to airflow. Static Pressure is like the blood pressure in your HVAC system’s duct work. We have two Youtube videos below that explain why it is important to know and test your HVAC system’s static air pressure. Thanks so very much to Eddie L for an excellent drawn-out explanation of what static pressure actually is and to Althoff Industries who explains and shows how to test static pressure! I hope that these videos help you understand the importance of having your HVAC System’s Static pressure tested.

You Can Search Our Site for More Troubleshooting Problems, Heating, Air Conditioning Parts and Supplies in the Google Seach box below.

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How to Wire Up a Heat Pump Thermostat?

We have many people ask us how do I wire up my new heat pump thermostat? How do I troubleshoot my heat pump thermostat? What do the wire colors mean? What are the functions of the wire and colors? What do the terminals on the thermostat mean? How do I wire up the auxiliary and emergency heat? Below we have an excellent Youtube video Made by AC Service Tech that answers all these questions. If you have any questions please email us anytime. Our email address is support@arnoldservice.com

You Can Search Our Site for More Troubleshooting Problems, Heating, Air Conditioning Parts and Supplies in the Google Seach box below.

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How Do I Use and Read a Refrigerant Gauge Set? How do I Check my AC or Heat Pump Refrigerant Charge?

troubleshooting air conditioners and heat pumps

Question: We have many people ask us the questions: How do I use and read a refrigerant gauge set? How do I check the AC refrigerant charge in my air conditioner or heat pump system? What do all those numbers and different colors mean? How do I check to make sure I have the right amount of refrigerant in my air conditioner or heat pump system?

Answer: We have three really good Youtube Videos made by Word of Advice TV and AC Service Tech LLC that shows how to read a refrigerant gauge set and how to charge air conditioning systems that use both R410A and R22 refrigerants.  I hope this helps you understand how to read a gauge set. I hope these videos help you get your air conditioner or heat pump charged correctly. If you have any questions please email us anytime or comment below. Our email address is support@arnoldservice.com.


You Can Search Our Site for More Troubleshooting Problems, Heating, Air Conditioning Parts and Supplies in the Google Seach box below.

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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

You Can Search Our Site for More Troubleshooting Problems, Heating, Air Conditioning Parts and Supplies in the Google Seach box below.

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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

You Can Search Our Site for More Troubleshooting Problems, Heating, Air Conditioning Parts and Supplies in the Google Seach box below.

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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 the top 10 air conditioner service call problems are. 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.

You Can Search Our Site for More Troubleshooting Problems, Heating, Air Conditioning Parts and Supplies in the Google Seach box below.

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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

You Can Search Our Site for More Troubleshooting Problems, Heating, Air Conditioning Parts and Supplies in the Google Seach box below.

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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

You Can Search Our Site for More Troubleshooting Problems, Heating, Air Conditioning Parts and Supplies in the Google Seach box below.