AC Capacitor Replacement During Maintenance in Frederick, MD
During a scheduled maintenance visit on an air conditioner in Frederick, MD, Larry identified a failing dual run capacitor — the kind of component that quietly degrades until it takes a motor down with it.
The 40+5 MFD dual run capacitor was replaced as part of the visit. This component serves both the compressor and the condenser fan motor, storing and releasing the electrical charge each needs to start and run reliably. A capacitor that’s out of spec doesn’t always announce itself with an obvious failure — it can cause motors to work harder than they should, shortening their lifespan before anything stops working outright. Catching it during a maintenance visit, rather than on a hot afternoon when the system won’t start, is exactly the kind of find that justifies keeping up with regular service.
With the new capacitor installed, the air conditioner left the visit with its electrical components operating within proper tolerances. The homeowner is enrolled in BPM’s maintenance plan, and this was the sixth visit under that agreement — a track record of consistent service that makes findings like this easier to catch early and less likely to turn into emergency calls mid-season.
No-Cool and Airflow Diagnostic on Air Conditioner in Frederick, MD
A homeowner in Frederick, MD called BPM when their air conditioner stopped keeping up — the system was running but not cooling, and several vents throughout the house were delivering noticeably weak airflow.
Shawn arrived and worked through the system to find the root cause. The diagnostic pointed to a refrigerant shortage: the system was low by a meaningful margin, which would account for both the reduced cooling capacity and the uneven airflow at the registers. To restore proper operation, Shawn added six pounds of R-410A refrigerant, bringing the charge back to the level the system needs to run efficiently.
With the refrigerant charge corrected, the system was back to moving conditioned air through the home as designed. Low refrigerant is a common culprit when a system seems to be running but can’t keep up — the compressor works harder, coil temperatures drop unevenly, and airflow through the duct system suffers as a result. If the system loses charge again, that’s a signal of a leak somewhere in the refrigerant circuit that would need to be located and repaired to prevent the same issue from recurring.
Failed Contactor Repair on Air Conditioner in Frederick, MD
A commercial property in Frederick, MD — Quinn Chapel Christian Life Center — had an air conditioner that had stopped running. The failed component turned out to be the contactor, a small but critical electrical switch that controls power delivery to the compressor and condenser fan motor. When a contactor fails, the system simply won’t start, regardless of what the thermostat is calling for.
Larry replaced the contactor with a 2-pole, 30-amp, 24-volt unit and brought the system back online. After the swap, he ran operational checks to confirm the system was performing within spec — the compressor drew 9.5 amps against its rated load, and the fan motor came in at 1.1 amps. Both readings landed where they should, indicating the rest of the system was in good shape and the contactor was the sole cause of the shutdown.
With the new contactor in place, the air conditioner was back to full operation. Contactors are a wear item — they cycle on and off every time the system runs — so catching a failed one early prevents the kind of extended downtime that can be disruptive for a facility in active use. The amp draw readings Larry documented give the property a clean baseline for future service visits.
Indoor Evaporator Coil Repair on Air Conditioner in Frederick, MD
A homeowner in Frederick, MD reached out to BPM after their air conditioner stopped cooling effectively. With summer heat putting real demand on the system, getting the unit back online wasn’t something that could wait.
Shawn diagnosed the problem and traced it to the indoor evaporator coil — the component responsible for absorbing heat from the air inside the home. When an evaporator coil fails, whether through a refrigerant leak, physical damage, or corrosion, the system loses its ability to transfer heat and cooling capacity drops off sharply. Shawn replaced the evaporator coil and recharged the system with refrigerant as part of the same service, restoring the refrigerant charge to the manufacturer’s specified level. Replacing the coil and recharging in a single visit avoids the common problem of a system that appears to be running but is still underperforming due to a low charge.
With the new evaporator coil in place and the refrigerant properly charged, the air conditioner was back to delivering full cooling output. The homeowner can expect consistent temperatures and normal humidity control — the two things an evaporator coil failure tends to knock out first. If the existing system is otherwise in good shape, this repair extends its useful life without the cost of a full replacement.
Capacitor Replacement on Air Conditioner in Frederick, MD
A homeowner in Frederick, MD reached out after their air conditioner began showing signs of trouble — the kind of performance issues that often trace back to a failing capacitor before a motor gives out entirely.
Larry inspected the system and identified a failed dual run capacitor — a 40+5 MFD unit — as the culprit. Capacitors store and release electrical current to help start and run the compressor and fan motors. When one degrades, it puts added strain on those motors, and left unaddressed, that strain can turn a relatively straightforward part replacement into a much more involved repair. Larry swapped out the failed capacitor with a new 40+5 MFD dual unit, restoring proper electrical support to the system.
With the new capacitor in place, the air conditioner was back to running as intended — motors starting cleanly, no undue electrical stress on the system. Catching a capacitor failure before it cascades into motor damage is exactly the kind of outcome a maintenance plan is designed to produce. The homeowner’s plan covered this as a second scheduled visit, keeping the system monitored and the repair addressed before a hot stretch turned a warning sign into a breakdown.
Refrigerant Leak Search on Cooling System in Frederick, MD
A commercial cooling system in Frederick, MD was showing signs consistent with a refrigerant leak — the kind of problem that quietly drives up energy costs and accelerates wear on compressor components if left unaddressed. The indoor air handler presented an additional challenge: difficult access made the diagnostic work more involved than a standard leak search.
Shawn performed an electronic leak search using a multi-halide detector to locate the source of the refrigerant loss. Because the leak wasn’t visibly evident at the unit, the electronic search was the appropriate tool — it can detect refrigerant concentration at levels that a visual inspection would miss. To support the process, nitrogen pressure was added to the system to boost pressure in the refrigerant circuit, helping confirm the leak location. The indoor air handler’s restricted access added time and complexity to the work, which factored into how the job was scoped.
With the leak identified and the diagnostic complete, the system is positioned for the next step — whether that’s a targeted repair or a broader refrigerant circuit service. Catching a refrigerant leak at this stage prevents the compressor from running in a starved condition, which is one of the more common causes of premature cooling system failure in commercial applications. The property is also enrolled in a commercial rooftop maintenance plan, which keeps the system on a regular service schedule going forward.
