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 March 2026 and June 2026.
The most recent job was on June 22, 2026.
Job Locations and Reviews
# HVAC Service - No Cool 10+ Years Old Responded to no cooling call on aging residential HVAC system. Upon arrival, found evaporator coil experiencing severe frosting condition. System was immediately shut down to prevent compressor damage and allow ice accumulation to thaw. Performed comprehensive diagnostic evaluation including refrigerant charge verification and airflow testing. Conducted detailed system assessment revealing airflow deficiency measuring 15% below manufacturer specifications. Identified restriction in ductwork system contributing to reduced airflow across evaporator coil, resulting in coil temperature drop below freezing point and subsequent ice formation. Evaluated blower performance and verified proper fan operation. Performed refrigerant charge analysis and confirmed system operating within acceptable parameters once ice had melted and airflow was restored. Inspected attic-mounted air handler and associated ductwork for proper installation and clearances. Verif
Completed full HVAC system replacement including removal and disposal of existing equipment. Installed American Standard 5A6H7048A1000 4-ton 17 SEER two-stage heat pump on plastic pad with snow legs per specifications. Mounted American Standard 5TEM6D06AV41S variable speed air handler in interior utility space with American Standard BAYHTR1517 15 kW electric heat pack and BAYSF1235 23.5" filter rack. Fabricated and installed metal duct transitions to adapt new equipment to existing ductwork. Replaced outdoor disconnect and electrical whip while reusing existing electrical service, condensation lines, and power lines where applicable. Installed Honeywell Digital WiFi Thermostat Elite Pro S1200 THX1200 for system control. Performed refrigerant charging and system startup procedures, verified proper operation using manifold gauges with system readings showing appropriate pressures and temperatures. System tested and confirmed operational with one-year parts and labor warranty from install
Completed preventative maintenance cooling system inspection on multi-zone HVAC system. Inspected and photographed HZ322 zone control panel with multiple heating and cooling zones, verified all indicator lights and digital display functionality, and checked terminal connections for proper wiring integrity. Inspected ductwork insulation and air handler unit in mechanical space, confirming proper installation and operation of flexible duct system with reflective insulation wrapping and reinforcement bands intact.
Conducted on-site evaluation of existing HVAC system for replacement estimate. Assessed outdoor condensing unit located on grade-level pad adjacent to structure, noting unit specifications and current operating condition. Inspected electrical service components including exterior disconnect box and associated conduit routing. Evaluated main electrical panel configuration, verified available amperage capacity, and documented existing circuit breaker arrangement to ensure compatibility with proposed replacement equipment. Provided comprehensive system replacement recommendations based on current equipment assessment and electrical infrastructure review.
Conducted on-site evaluation of 30-year-old HVAC system located in basement for replacement estimate. Documented existing Bryant furnace and air handler equipment with photos, assessed current installation configuration including ductwork connections and PVC condensate drainage system. Customer is obtaining multiple estimates for complete system replacement.
Responded to no cooling or heating call and performed diagnostic inspection of HVAC system. Upon arrival, confirmed system was not operating in either heating or cooling mode. Conducted thorough examination of internal components including evaporator coil, refrigerant lines, electrical connections, and capacitor. Inspected wiring harnesses, wire nuts, and all electrical terminations for proper connections and signs of failure. Documented system condition with photos showing coil assembly, copper refrigerant piping, capacitor, and complete wiring configuration for further evaluation and repair recommendations.
Performed comprehensive inspection and flush service on wall-mounted tankless water heater unit. Accessed internal components, verified proper operation of heating elements and control systems, and completed descaling flush procedure to remove mineral buildup and maintain optimal efficiency. All plumbing connections, copper piping, expansion tank, and PVC exhaust venting were inspected and confirmed to be functioning properly with no leaks detected.
Performed preventive maintenance inspection on ductless mini-split system as part of post-installation agreement coverage. Evaluated outdoor condenser unit condition, noting accumulated debris and weathering on exterior surfaces and coil assembly. Recorded indoor temperature readings at 68.5°F to verify system performance and proper operation of heating/cooling functions.
Responded to no cooling call on system less than 10 years old. Performed diagnostic evaluation using thermal imaging camera to identify temperature differentials and potential component failures. Customer was informed of findings and repair options with available discount, and photos were documented for service records.
Completed warranty repair on Rheem Marathon water heater Model MR50245 by installing two OEM 240V/4500W screw-in heating elements. Drained unit, removed failed elements, installed replacement components with proper torque specifications, refilled system, and verified operation. Unit tested successfully with all functions operating within normal parameters and no error codes displayed on control panel.
Completed routine cooling maintenance visit on outdoor condenser unit. Unit exterior screening was heavily soiled with accumulated debris, dried leaves, and organic matter affecting airflow efficiency. Cleaned condenser coils and exterior surfaces, removed debris from fan guard and surrounding area, and verified proper system operation upon completion.
Responded to no cooling complaint on residential air conditioning system. Accessed outdoor condenser unit and crawlspace entry to perform diagnostic evaluation and preventive maintenance service. System was not maintaining adequate temperature differential, with indoor conditions elevated above setpoint. Completed full system inspection, performance testing, and tune-up procedures to restore proper cooling operation and efficiency.
Completed scheduled cooling maintenance visit on residential HVAC system. Performed electrical diagnostics using clamp meter to verify proper amperage draw and system operation at outdoor condensing unit. Measured current readings on compressor circuit and confirmed electrical connections at capacitor terminals were secure and within manufacturer specifications. Verified thermostat operation and settings, noting system currently in heating mode with temperature set to 74°F and fan set to auto operation. All electrical components functioning properly with no deficiencies noted during inspection.
Completed installation of 50-gallon Rheem Marathon electric water heater, including filling tank and purging air from the system. During system startup and testing, discovered internal leak at bottom of existing 105-gallon Rheem Marathon tank (Model: MR10528, Serial: 0312W36790, manufactured May 2012). Determined tank failure is non-repairable internal defect requiring complete unit replacement. Documented equipment information and captured photographic evidence of failed unit for warranty verification purposes, including images of tank identification labels, plumbing connections, expansion tank, and overall system configuration.
Removed and disposed of existing geothermal equipment and installed complete dual fuel heating and cooling system. Installed Carrier 59SC2E080M21 96% two-stage gas furnace with variable speed blower for natural gas operation in attic space. Mounted Carrier 27SCA542A003 3.5-ton 15 SEER heat pump outdoor unit on pressure-treated wood platform. Installed Carrier CAAMP6121 evaporator coil and fabricated metal duct transitions to adapt new equipment to existing ductwork. Extended refrigerant lineset from basement geothermal cube location through exterior wall to new outdoor unit position. Replaced outdoor disconnect and electrical whip to meet code requirements for new equipment. Reused existing filter rack at unit and provided two 20x20x5 filters with installation. Reused existing electrical service, condensate drain lines, and power connections where applicable. Installed Honeywell digital dual fuel thermostat system with wireless outdoor temperature sensor for optimized heating source se
Conducted on-site assessment of existing 40-gallon medium electric tank water heater in summer rental property experiencing inadequate hot water capacity. Evaluated current electrical service at breaker panel and documented existing water heater installation including copper supply piping and brass fittings in utility closet. Prepared estimate for conversion from electric tank water heater to propane-fired tankless system to improve hot water availability and accommodate seasonal rental demands prior to peak occupancy period.
Completed warranty replacement installation of Rheem tanked water heater. Removed existing failed unit and installed new tank with proper water supply connections, pressure relief valve, and electrical wiring to terminal block. Verified all plumbing connections for proper sealing, tested pressure gauge readings, and confirmed electrical connections with appropriate wire terminations. System tested and operational upon completion.
Performed comprehensive cooling system tune-up and inspection on single HVAC system. Verified thermostat operation and calibration, confirmed system settings at 71°F with proper display function. Completed preventive maintenance checklist including filter inspection, refrigerant level verification, electrical component testing, and overall system performance evaluation to ensure optimal efficiency and reliability for upcoming cooling season.
# HVAC Estimate - Replacement Summary Conducted site evaluation for 17-year-old geothermal system replacement serving upper level of residence. Primary concern identified as leaking indoor coil in basement-mounted geo cube unit, necessitating complete system replacement due to age and condition of equipment. Assessed existing upstairs air handler installation, originally converted from furnace configuration in 2009. Inspection revealed current system operating on inadequate 14-gauge wiring with 15-amp breaker and no auxiliary heat capability. Documented attic-mounted ductwork distribution system with metallic flexible ducts and existing insulation conditions. Examined basement mechanical room housing white air handler unit with associated refrigerant lines and condensate piping. Provided comprehensive replacement quote for new geothermal system including indoor coil and air handler. Advised customer that installation of air handler with auxiliary heat kit will require licensed elect
Conducted replacement estimate for 14-year-old HVAC system that is currently operational with no reported issues. Inspected existing air handler with digital control panels and insulated ductwork. Documented system condition with photographs for accurate replacement proposal.
