Service & Maintenance

Troubleshooting Challenge: A Preventive Maintenance Check on a Heat Pump

By Jim Johnson
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In this month’s troubleshooting situation, the customer hasn’t called because their HVAC system has stopped cooling. You’re there because they’ve requested a preventive maintenance check of the five-year-old equipment to determine if there are any potential problems that would affect the system performance in the future.


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Btu Buddy 123: Devastated 20-Ton Condensing Unit - Part 2

By Bill Johnson
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Bob and Tim were driving to the job they left yesterday and talking over what needs to be done today, when Tim asked, “How are we going to move the condensing unit we disconnected to the new location so we can connect it to the system where we disconnected the defective condensing unit? You said you had a plan.”


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HVACR Tips: Ladder Safety

Set Your Ladder at the Proper Angle, Make Sure It Is Secure
By Leo A. Meyer
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Don‘t brush off ladder safety rules because you‘ve used ladders all your life. You may learn a thing or two.


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Btu Buddy 122: Devastated 20-Ton Condensing Unit - Part 1

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Bob and Tim were on their way to a no cooling call at a commercial building location. This is a large manufacturing plant that has a number of installations. They arrive and talk to the maintenance man and he tells them which unit it is and goes with them to the area that the unit serves. It is a large room served by a 20-ton split system.


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Troubleshooting Challenge: A Split System That’s Still Sitting Dead

By Jim Johnson
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In this month’s troubleshooting problem we have a homeowner who has attempted to repair his own equipment, and he has replaced two components. The original symptom of the split system sitting dead still exists.


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Btu Buddy 121: Heat Pump No Heat Call - Part 2

By Bill Johnson
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Bob and Tim had left this residence a few days ago when they discovered that the four-way valve on the home’s heat pump was stuck in the cooling mode. They tried several things to get the valve to do its normal changeover to the heating mode and couldn’t get it to function. The valve would need to be replaced.


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Fifteen Essentials of a Residential HVAC Tune-Up

By Greg Mazurkiewicz
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It’s well recognized that your car or truck needs regular maintenance. HVAC contractors and technicians likewise emphasize to their residential customers that their HVAC system needs a regular tune-up to keep the unit up and running and provide optimum performance. Here are 15 essentials of a residential HVAC tune-up.


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Btu Buddy 120: Heat Pump No Heat Call - Part 1

By Bill Johnson
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Bob and Tim were on their way to a service contract routine procedure when the dispatcher called and asked them to go to a residence that had no heat and had a very sick family member. They needed heat as quickly as possible.


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Troubleshooting Challenge: A Modular A/C Unit That’s Not Cooling

By Jim Johnson
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In this month’s troubleshooting situation, we’re taking you to a school, but not to the equipment room of the main building. Instead, it’s a modular classroom (similar to a double-wide manufactured home) that is brand new, and employs a heating/cooling unit that mounts on one end of the building. 


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Btu Buddy 119: Low Heat and a Hot Furnace

By Bill Johnson
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Bob and Tim were on their way to a “low heat” call at a residence when the dispatcher called them back and told them that the homeowner had called and explained that the furnace was hot, but the home was cold. The dispatcher had told the owner to shut the furnace off until Bob and Tim arrived. 


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