Posted on Leave a comment

Question: What are the best furnace and air conditioning systems that you would recommend?

Question: What are the best furnace and air conditioning systems that you would recommend? What brand name furnaces and air conditioners do you see the least amount of problems.

Answer: I have this question asked hundreds of times since we started our HVAC business in 1988! This is a great question! In my experience over the many years doing service work, I like the Trane, American Standard, Bryant, Carrier, Heil, and ICP units the best. I will not say that the other brand names are bad, but the Trane, American Standard, Bryant, Carrier, Heil, and ICP are the brand names that I installed and serviced the most.  These brand names are the brands where I had the least number of service calls and problems.  I could clearly see and feel that these brands were constructed with heavy-duty long-lasting materials and components. They just felt and looked well made. The metal was thicker. I would recommend Trane, American Standard, Bryant, Carrier, Heil, and ICP brand name furnaces and air conditioners. Trane and American Standard would be my top choices. I must add this important note: I would highly recommend that you get a licensed HVAC contractor to install your new equipment. Make sure that your contractor does a heat gain, heat loss calculation (manual J) calculation so you know that you are getting the right size furnace and air conditioner installed. Make sure that your contractor gets a permit from your local Housing Department so that you are getting a legal safe inspected HVAC installation and you will not have problems if you ever have an insurance claim or try and sell your home. I found a really good HVAC Load Calculator on the following page if you want to do some load calculations yourself. I also found a really good YouTube video, below that was made by Jay from Word of Advice TV. This video thoroughly explains what Jay found in Consumer Reports Magazine for the best HVAC, name brand equipment. Consumer Reports surveyed over 20,000 homeowners about their experiences with their HVAC equipment.  Thanks so much to Word of Advice TV for making this excellent video! Below the video, I have notes that I took from the video about the Consumer Reports survey. I have the brand names broken down with the companies they represent below. I hope that this helps you out when you need to purchase a new heating and air conditioning system. I sure did learn a lot from this video! Please let us know if you have any questions in the comments below or by emailing us at arnoldservice@gmail.com. We Would Love to Help You Out and Earn Your Business! 

Consumer Reports 5 Brands They Would Not Recommend:

  • Coleman
  • Frigidaire
  • Luxaire
  • Maytag
  • York

Consumer Reports 5 Brands They Would Recommend:

  • Lennox
  • American Standard
  • Trane
  • Carrier
  • Bryant

Brand Names Produced and Owned by United Technologies:

  • Carrier
  • Bryant
  • Payne
  • Day & Night
  • ICP
  • Arcoaire
  • Keeprite
  • Heil
  • Tempstar
  • Comfortmaker

Brand Names Produced and Owned by Lennox International:

  • Lennox
  • Ducane
  • Armstrong
  • Concord
  • Allied
  • Air-Ease
  • Air-Flo

Brand Names Produced and Owned by Rheem Manufacturing:

  • Rheem
  • Ruud

Brand Names Produced and Owned by Daikin Global: 

  • Daikin
  • Goodman
  • Amana
  • Janitrol

Brand Names Produced and Owned by Johnson Controls: 

  • York
  • Luxaire
  • Coleman

Brand Names Produced and Owned by Ingersoll Rand:

  • American Standard
  • Trane

Brand Names Produced and Owned by Nortek Global HVAC:

  • Frigidaire
  • Maytag

Brand Names Produced and Owned by WolfSteel:

  • Napoleon
  • Continental

We hope this helps you out in making a decision on purchasing the right equipment for your home.

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

Posted on Leave a comment

Problem: Why does my furnace go off on limit so much? Why do I have to replace my furnace limit switch so often?

furnace limit switch

Problem: Why does my furnace go off on limit so much? Why do I have to replace my furnace limit switch so often?

Answer: I have noticed this year more than any other year that we are having many questions about this problem. We are selling lots of furnace limit switches. The sales are great, but I have to be concerned about why all these customers are having to replace so many limit switches? A gas furnace that is maintained and adjusted properly should rarely go off on limit unless there is a serious problem with the furnace! The limit is a safety control that prevents the furnace from overheating. If your furnace is going off on limit then this means your furnace is overheating beyond normal.  I would highly recommend that you find out why the furnace is overheating and get this problem corrected. Here are some areas that you can check if your furnace is going off on high limit:

  1. You could have a blower motor that has failed to start or is slow in running.  You might need a new blower motor.  In many cases, a new capacitor or changing the blower speed might eliminate the furnace going off on high limit.  If you think you need a new capacitor please click here to see the capacitors that we sell.  If you would like to know how to change the speed on your blower motor then there is a really good YouTube video on this subject made by AC Service Tech. Please click here if you would like to see the YouTube video on how to change blower motor speeds. 
  2. You could have a dirty obstructed furnace filter. The furnace is not getting enough air and the heat exchanger overheats causing the furnace limit to open and stop the gas from burning to prevent a fire or damage to the furnace.  I am sure that you know it is important to change furnace filters on a regular basis.
  3. You could have a dirty furnace blower wheel. If the blower wheel is dirty the wheel can not pick up enough air to keep the furnace from overheating. We have a picture below that shows a dirty blower wheel. As you can see this wheel is not going to pick up much air!

4. You could have a dirty or stopped up evaporator coil. If the underside (on an up-flow furnace) Air conditioner coil is stopped up with lint or dirt then this will cause the furnace to overheat and go off on limit. The furnace can not get rid of the heated air so the heat builds up and the furnace goes off on limit. A stopped-up evaporator coil hurts the furnace and air conditioner’s efficiency a lot. Make sure that your evaporator coil is not stopped up so air can easily flow through the evaporator coil. We have a post about cleaning evaporator coils on the following page: Please click here if you are interested in seeing how to clean an evaporator coil.

Above is a Picture of a Partially Stopped Up Evaporator Coil:

5. You could have obstructed returns or supply registers. Make sure that all returns are not obstructed with furniture or stopped up with dirt. Make sure all the supply registers are open.

6. You could have the gas valve adjusted too high where the gas input from the gas valve is producing too much heat for the furnace to handle. Please click here if you would like to see our post on how to adjust gas valve pressure. 

7. Last but not least. You might not have the recommended temperature rise on your furnace. Every furnace should have a label that shows what the recommended temperature rise is for the furnace. If the furnace is adjusted to the manufacturer’s recommended temperature rise then the furnace should not be going off on high limit.

We have three really good YouTube videos below that explain what temperature rise is and how to troubleshoot if your temperature rise is not within the recommended range that is set by the furnace manufacturer. The first YouTube is a 2-minute tutorial that explains what temperature rise is by Tom Kleinman. Thanks to Mr. Kleinman for making this information easy to understand in a video! The next video shows how to measure temperature rise on a furnace. You do not have to have a digital temperature meter like in the video. A low-cost thermometer could be used to measure the temperature rise in your furnace. This 3-minute video is by Lennox Learning Solutions. The third video shows the top 4 reasons why a furnace short cycles by AC Service Tech LLC.  Many thanks to AC Service Tech for making this great video! If you have any questions please email me, Steve Arnold, or comment below. Our email is arnoldservice@gmail.com.  I will be happy to try and answer any questions that you have. God bless you all! Thanks so much for reading our post and visiting our site! We Would Love to Help You Out and Earn Your Business! 



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

Posted on Leave a comment

Question: How do I clean the burners on my gas furnace?

Question: My furnace burners do not light all the way across. The farthest burner from the gas valve will not light unless I cycle the furnace multiple times to warm up the furnace. Would cleaning the burners help?  How do I clean the burners on my gas furnace? Do you have any other suggestions for fixing my furnace?

Answer:  It sounds like your problem could be caused by dirty burners or not having enough gas pressure. I would suggest that you try to clean the burners by blowing them out with compressed air if you have an air compressor. There are 4 main burner types that are shown below :

  1. The Inshot burners are the most common and popular burners used today.  The Inshot burners are used on many 80% and 90% furnaces. The Inshot burner can not be used on a 70% furnace.
Above Inshot Burner Closeup:

2. The Upshot burners are seen on many of the really old furnaces. Most of the time they are made of cast iron.

3. Ribbon burners or Stamped Steel burners. This type of burner is found on many of the older 70% name brands. Many of the older furnaces like Bryant, Carrier, York, Trane, Lennox, Ruud, and Rheem have ribbon, stamped steel burners.

Make sure that you were eye protection and a dust mask if you decide to use compressed air to clean your burners. I have seen dust, rust and dirt go everywhere when using compressed air. If you are in a place where you can not use compressed air indoors a home then I would like to suggest turning the power and gas off to the furnace then taking the burners out and using compressed air outside the home. I find it best to use a wire brush and a vacuum to clean the burners. I have used both methods with and without compressed air with success. The compressed air method seems to clean the burner better. We have a really good YouTube video made by Word of Advice TV below that shows how to clean gas furnace burners. We also have a really good YouTube video that shows the different types of gas furnace burners. This video is made by Grayfurnaceman. If after cleaning the burners you still have problems then if you want you could try adjusting the gas pressure up a little bit. I would not recommend turning the gas regulator up over 1/4 turn at a time before testing. Be ready to turn the power switch off to the furnace if the furnace has delayed ignition for more than a second or two. We have a really good YouTube video made by AC Service Tech that tells how to adjust the natural gas pressure on a gas furnace. If you still have problems you might try cleaning the flame sensor. We have a post about this on the following page:  Click here if you are interested in how to clean a gas furnace flame sensor and how to troubleshoot a flame sensor.  I hope this helps you out. If you have any questions please let me know by emailing me or commenting below. Our email is arnoldservice@gmail.com We would love to help you out and earn your business! Steve



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

Posted on Leave a comment

Problem: How do I check to see if I have a bad furnace gas valve or a bad control board?

Troubleshooting Gas & Electric Furnaces

Problem: My gas furnace’s draft inducer starts, the furnace ignitor glows but the furnace never gets a gas flame. Do I have a control board problem or do I have a gas valve problem? I have checked my pressure switch and the pressure switch is closing when the draft inducer is on. How can I test the gas valve and control board to see which part is at fault?

Answer: Thanks for asking this question. First, I would recommend that you test to make sure all your safety controls are closed and the safety controls are allowing electricity to flow through them. The safety controls would be the pressure switch, which you have already tested, the rollout switches, and the limit switch. If any of the safety controls are open then the furnace will not operate. We have a really good post and Youtube video on testing safety controls on the following page: https://arnoldservice.com/problem-how-do-i-test-my-gas-furnace-rollout-switch-limit-switch-pressure-switch-and-flame-sensor/ I would like to suggest that you make sure that the gas valve and the furnace’s gas cock are turned on. If you have an LP furnace make sure that the LP tank is actually filled well enough. Make sure that if your thermostat has batteries that the batteries are in good condition.  We have two really good YouTube videos below made by Gray Furnace Man that show how to test gas valves to see if the gas valve is getting power or not. If the gas valve is getting power and not opening then you more than likely have a gas valve problem. If the gas valve is not getting any power when it is supposed to be getting power to open then more than likely you have a control board problem.  Below are two great YouTube videos that explain how to test a gas valve with a clamp-on meter and how to test a gas valve with meter probes. Thanks so very much to Gray Furnace Man for making these videos! If you have any questions please comment below or email us at arnoldservice@gmail.com. We hope this helps you solve and fix your furnace problem. 

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

Posted on Leave a comment

Problem: How Do I Test My Gas Furnace Rollout Switch, Limit Switch, Pressure Switch and Flame Sensor?

Problem: My gas furnace’s ignitor will not glow, my electronic ignition will not spark and my gas furnace will not ignite the gas. Steve, You told me to make sure that all my safety controls are closed before testing the control board and other components for problems. Where are the furnace’s safety controls that you are referring to and how do I test these controls to make sure they are working correctly?

Answer: We have this question asked a lot. For the gas furnace to operate the safety controls like the rollout switches, limit switch, and pressure switch have to be closed and allow the 24 volt AC current to flow through the controls. If you have an open safety control then your furnace will not operate. The safety controls are installed by the manufacturer’s engineers to prevent a fire and possible carbon monoxide poisoning. The flame sensor has to sense the gas burner flame and send microamps back to the furnace control board telling the control board that there is a flame. No flame sensed by the flame sensor then within 8 to 10 seconds the flames cut off. No heat!  We have an excellent YouTube video made by AC Service Tech LLC below that explains how to quickly test and troubleshoot these safety controls. If you find out that you need a rollout or limit switch then please click here to see the rollout and limit switches that we sell. If you test and find out that you need a pressure switch then please click here to see the furnace pressure switches that we sell.  If you find out that you need a flame sensor then please click here to see the flame sensors that we sell. If you have any questions or if you would like for us to look up parts then please send us your furnace’s model number by email at support@arnoldservice.com. We will be glad to try and help you out. Please comment below if you have any questions or comments.  We would love to help you out and earn your business! 

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