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A contractor repairing a heat pump here starts by factoring in what the equipment has actually been running against. 283 severe weather events were recorded in Lehigh County, Pennsylvania between 2015 and 2024. At that rate, severe weather is a standing condition in this county, not an occasional interruption, and it shows up in repair work. Refrigerant lines, contactors, and capacitors all absorb that cumulative load, and a contractor who skips that history before diagnosing a fault is working from an incomplete picture. The worn component a homeowner is looking at may have a weather explanation, and knowing that changes which part gets replaced and whether anything adjacent needs inspection too.
Ductwork laid down for a different generation of heating equipment does not disappear when a heat pump goes in; it stays in the walls and ceiling cavities, and it is often what a contractor is actually chasing when a heat pump repair call comes in. Half the homes in Lehigh County, Pennsylvania were built in 1968 or earlier (2020-2024 ACS 5-year). That history means many systems here are running through ducts that were sized and routed for something else, and leaks or restrictions in that ductwork can produce symptoms that point squarely at the unit. A contractor who opens the heat pump and finds clean internals will turn next to the duct runs, because that is where the performance loss is.
The Parts of a Heat Pump a Contractor Checks First
The outdoor unit is what most homeowners see first, and it is where a contractor starts. It holds the compressor, which drives the whole system, and the coil that exchanges heat with the outside air. When either one is the problem, the system stops moving heat altogether.
Inside the house, the air handler pushes conditioned air through the home and holds the indoor coil, the blower motor, and the expansion valve that controls refrigerant flow. The refrigerant lines connecting the two units and the reversing valve, which sits in the outdoor unit and switches the system between heating and cooling, round out what a contractor examines when tracing a fault.
The drawing shows the general layout of a heat pump system, and a licensed contractor determines what applies to your specific house.
Find a contractor in Lehigh CountyLehigh County, by the numbers
283 severe weather events were recorded in Lehigh County, Pennsylvania between 2015 and 2024.
NOAA National Centers for Environmental Information, Storm Events Database, bulk CSV export, events 2015-01-01 through 2024-12-31.Half the homes in Lehigh County, Pennsylvania were built in 1968 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesLehigh County, Pennsylvania holds 151,220 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 65.6% of the occupied homes in Lehigh County, Pennsylvania (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCodes & Standards for Heat Pump Repair in Lehigh County, Pennsylvania3 sourced rules & standards
What Lehigh County, Pennsylvania Requires for HVAC Repair Work
Pennsylvania names the trade in its own definition: installing central heating or air conditioning is a home improvement under the Act, whether or not the equipment is affixed — so an HVAC installation is work the registration requirement reaches.
A Pennsylvania registration displaces the local one: no political subdivision may require a home improvement contractor to register, license or pay a fee on top of it, though building permits and local code enforcement still apply.
Pennsylvania requires home improvement contractor registration rather than a licence: nobody may hold themselves out as a contractor, or perform any home improvement, without first registering with the Bureau of Consumer Protection.
Severe Weather Events in Lehigh County
Extreme weather puts real stress on heat pump systems, forcing them to run harder and longer than conditions they were sized for. How often that happens here shapes how much wear local equipment takes and what kinds of repairs come up most.
283 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.