Lewes, DE
As Delaware's first town, Lewes has weathered centuries of change, but no amount of history prepares a homeowner for a failing air conditioner in the thick of a mid-Atlantic summer. From the quiet streets of Cape Henlopen to the busy waterfront, Lewes, DE, residents know that coastal heat and humidity are serious business from June through September. Custom Mechanical has been the Delmarva region's go-to heating and air conditioning service provider since 1981, bringing licensed expertise, honest pricing and rapid response times to one of Delaware's most treasured communities. When the heat rolls in off the Delaware Bay, we make sure you're ready for it.
Emergency Air Conditioning Repair in Lewes, DE
A cooling system that struggles to keep pace with Lewes' summers burns through energy and money with every cycle. Inefficient AC systems can consume up to 20% more electricity than properly maintained air conditioners, resulting in higher cooling bills month after month. Custom Mechanical's certified service technicians perform thorough diagnostic evaluations to identify the exact cause of your AC system's underperformance, whether that's a refrigerant imbalance, a failing compressor, clogged air filters or deteriorating ductwork. Our air conditioning repair process is transparent from start to finish. We explain what we find, outline your options clearly and complete most AC repairs in Lewes, DE, on the first visit, thanks to our fully stocked service vehicles.
Extend Equipment Life With Seasonal HVAC Tuneups in Lewes, DE
Lewes, DE, homeowners who invest in seasonal HVAC tuneups consistently get more years out of their equipment and spend less on heating and air conditioning repairs over time. The logic is straightforward: a system that's cleaned, calibrated and inspected regularly runs more efficiently, experiences less mechanical stress and is far less likely to fail at the worst possible moment. Custom Mechanical's comprehensive heating and air conditioning service visits cover every critical component, from heat exchanger inspections and refrigerant level checks to blower motor testing and thermostat calibration. Think of it as putting your system through its paces before the demands of the season.
Future-Proof Your Lewes, DE, Home with a High-Efficiency Upgrade
Lewes, DE, is a community that values preservation. But when it comes to your HVAC equipment, clinging to an aging system past its prime is a costly habit. Most central air conditioners have a functional lifespan of 15 to 20 years, and systems approaching that range operate at a fraction of their original efficiency regardless of how well they have been maintained. Today's ENERGY STAR-certified heating and cooling systems deliver measurably superior performance. Custom Mechanical guides Lewes homeowners through every step of the upgrade process, from selecting the right system size and brand to professional installation and post-installation support.
Ready to make the upgrade that pays for itself? Call Custom Mechanical today to learn more about our heating and air conditioning services in Lewes, DE.
Recent Jobs and Reviews in Lewes, DE
Lewes, DE at a glance
Custom Mechanical has completed 20 jobs in Lewes, DE between August 2026 and October 2026.
The most recent job was on October 16, 2026.
Custom Mechanical has completed 58 jobs in Lewes, DE in the last 12 months.
Job Locations and Reviews
Removed the leaking water heater and installed a new 50-gallon tall Bradford White tank-type unit. Installed a new drain pan, thermal expansion tank, brass nipples, tee, and fittings, and connected the water lines with 18" flexible connectors. Verified all connections are secure with no leaks and the unit is operating properly.
Renewed the pressure/temperature-rated unit components on the wall-mounted tankless water heater, with the front cover removed to access the internal control board, copper tubing, and wiring. Inspected the gas supply line, water connections, and PVC venting, and verified the exterior vent terminations were intact and unobstructed. Flagged a potential natural gas conversion for follow-up.
Performed scheduled heating maintenance visit on the propane-fired system, including operational testing and combustion analysis. Flue gas readings were recorded with a combustion analyzer (O₂ 16.6%, CO 16 ppm, stack temperature 95°F), confirming CO levels within acceptable limits and the system operating safely.
Performed seasonal heating maintenance on the natural gas furnace, including inspection of the ductwork, damper actuators, condensate/PVC venting, and electrical connections. Conducted a combustion analysis with a Bacharach analyzer, recording 4.4% O₂, 9.3% CO₂, 90.4% efficiency, and 126°F stack temperature, with CO within acceptable limits. The system was found to be operating properly, with no visible signs of rust, cracking, or ice.
Performed a descaling flush on a wall-mounted Noritz tankless water heater, circulating descaling solution through the heat exchanger to remove mineral buildup and restore flow and heat transfer efficiency. Inspected the unit, venting, and gas and water connections, finding no visible rust, frost, or cracks, and returned the system to normal operation.
Performed routine heating system maintenance visit as requested. Conducted combustion analysis using Bacharach Insight analyzer, recording optimal performance readings: O2 at 12.4%, CO at 4 ppm, efficiency at 89.9%, CO2 at 5.6%, and stack temperature at 114°F, all within acceptable operating parameters.
Removed and disposed of existing HVAC system and completed full heat pump installation. Installed one Lennox ML14KP1-036 3-ton 14 SEER heat pump outdoor unit on pressure-treated wood platform with gravel base, one Lennox CBK43UHET-036 air handler in attic space, and one Lennox 10kW electric heat pack. Fabricated and installed metal duct transitions to adapt new equipment to existing ductwork. Replaced outdoor disconnect and electrical whip with new components. Reused existing condensate drain lines and verified proper operation. Ran new refrigerant lines connecting outdoor condenser to indoor air handler with proper insulation. Installed Honeywell digital WiFi thermostat and completed programming for system operation. Verified all electrical connections, tested system startup and operation in both heating and cooling modes. Confirmed proper airflow, refrigerant charge, and thermostat communication. Customer was instructed to use MERV8 filters at the unit. System tested and left in full
Performed routine maintenance inspection on single HVAC system located in basement utility area. Inspected furnace/air handler unit, verified proper operation of all components, checked ductwork connections and PVC condensate drainage system. System found operating within normal parameters with no immediate repairs required.
Removed and disposed of existing heat pump and evaporator coil, retaining the existing furnace and thermostat for continued use. Installed new 3-ton, 14 SEER heat pump unit on existing wall bracket with concrete pad placement, along with new evaporator coil matched to system specifications. Flushed existing refrigeration lines to remove contaminants, performed pressure testing to verify system integrity, and recharged lines to manufacturer specifications. Furnished and installed electrical disconnect with whip connection to outdoor unit, incorporating surge protection disconnect due to absence of panel-level surge protection. All equipment tested and confirmed operational upon completion.
Diagnosed residential HVAC system in crawl space and identified failed blower motor and low-pressure switch requiring replacement. Provided comprehensive equipment replacement estimate as alternative solution, documenting existing air handler unit with copper refrigerant lines, condensate drain system with pump, and flexible ductwork installation. Recorded model and serial numbers for pricing comparison between component repair and full system replacement options.
Performed heating system operational check and combustion analysis. Unit tested within acceptable parameters with combustion efficiency at 90.3%, oxygen level at 12.0%, carbon monoxide at 5 ppm, and stack temperature at 112°F.
Responded to no-cooling complaint on first floor heat pump system approximately 7 years old. Upon arrival, performed diagnostic testing of outdoor unit and refrigerant system using digital gauges. Inspected condenser unit, refrigerant lines, electrical connections, and disconnect box. Evaluated system operation and assessed filtration concerns mentioned in service request. Unit found operational after inspection and testing procedures completed.
Responded to no cooling call on residential split system. Upon arrival, found outdoor condenser unit operational but system not achieving setpoint with indoor temperature rising. Performed diagnostics including refrigerant charge verification, measuring superheat at 150°F and subcooling at 15% below target parameters. System was shut down to prevent compressor damage. Inspected attic-mounted air handler and ductwork for airflow restrictions or equipment malfunctions. Documented equipment conditions with photos showing outdoor unit placement and attic installation configuration for further assessment and repair recommendations.
Completed preventive maintenance cooling visit on geothermal HVAC system. Inspected system components including PVC condensate drainage lines, ductwork, and structural supports in attic space. Verified proper insulation placement around mechanical components and confirmed all accessible piping connections showed no active leaks, though noted age-related corrosion on metal piping that will require monitoring during future visits.
Responded to third callback for no cooling condition on system less than 10 years old. Upon arrival, performed comprehensive diagnostic evaluation of both outdoor condensing unit and indoor air handler. Inspected condenser operation, verified proper electrical connections at outdoor disconnect and control board, and checked refrigerant pressures. Examined indoor air handler for airflow restrictions, filter condition, and proper blower motor operation. Documented equipment condition with photos showing exterior condenser installation with associated piping and electrical connections, as well as attic-mounted air handler with visible ductwork and refrigerant lines. Determined root cause of cooling failure and provided customer with repair options and associated costs for resolution, as this represented a new issue separate from previous service visits.
Responded to no cooling complaint on 2018 heat pump system. Upon inspection, found unit operating with significantly low refrigerant charge. Utilized charging chart and measured operating conditions to confirm system was undercharged and unable to maintain proper cooling capacity. Determined that refrigerant recovery and comprehensive leak search will be required to locate source of refrigerant loss before system can be properly recharged. Verified unit is out of manufacturer warranty coverage. Coordinated follow-up appointment scheduling through office for leak detection service.
# HVAC Maintenance Service Completed Performed comprehensive heating and cooling system maintenance on residential split HVAC system. Inspected indoor air handler unit located in utility closet alongside water heater, verifying proper operation of all components and connections. Examined refrigerant lines, electrical connections, and ductwork for signs of wear or damage. All indoor unit labels and safety information confirmed visible and legible. Proceeded to outdoor condenser unit for external inspection and maintenance procedures. Accessed light green condenser unit positioned on concrete pad with brick border edging. Evaluated fan grille assembly, condenser coil condition, and overall unit operation. Verified proper clearances around equipment and checked for debris accumulation. Completed routine maintenance tasks on cooling system components as part of recurring service agreement. Both heating and cooling systems inspected and confirmed operational.
Completed scheduled maintenance inspection on second of two tankless water heater units located in attic space. Performed comprehensive system check including examination of gas connections, water supply lines, exhaust venting, and control panel operation. Verified proper function of all components, confirmed secure mounting, and ensured all connections remain leak-free and properly insulated.
Conducted on-site estimate for whole house water filtration system installation. Assessed existing plumbing infrastructure, including main water line entry point and available space for equipment placement. Documented current piping configuration with gray PVC distribution system and identified optimal location for filter integration. Initial appointment rescheduled to following day to complete installation planning and finalize system specifications.
Replaced slim duct system and extended condensate drain line for residential HVAC installation. Installed one soffit inlet, four sections of white slim duct, and four couplings to complete the ductwork replacement. Extended drain line routing through the new slim duct assembly using extension ladder for elevated access.
