Heat Pump Service Review — Winston-Salem
Heat pumps are the dominant HVAC equipment in Forsyth County residential construction. The contractor who knows heat pumps well is a different specialist than one who primarily works gas furnaces or straight cooling systems. The difference becomes visible in how they approach the heating mode.
Half a Diagnostic Is Not a Diagnostic
A contractor who checks refrigerant only in cooling mode — and declares the system fine for winter — has done half a diagnostic. The useful distinction is whether they checked the reversing valve, tested defrost board initiation, and measured discharge air temperature in heating mode. If they cannot describe those checks, they did not do them.
Predictable Failure Patterns
When it appears
- Capacitor failureSummer, after high-load operation
- Defrost boardLate autumn and winter
- Refrigerant leakGradual
- Reversing valve stuck in coolingWinter
How it presents
- Capacitor failureMost common seasonal failure
- Defrost boardAccelerated by dusty or poorly-maintained coils
- Refrigerant leakOften attributed to seasonal loss until the system stops keeping up
- Reversing valve stuck in coolingCools normally but provides only resistance heat
One System, Two Refrigerant Cycles
Cooling mode
A familiar refrigerant cycle most contractors check competently in summer.
Heating mode
A heat pump's refrigerant cycle runs differently in heating than in cooling. Pressures, temperature relationships, and component behavior all shift — and a contractor who checks only cooling has done half the diagnostic.
Both Modes, Documented
In practical terms, the evidence points to documented heat pump service in the Winston-Salem area — service summaries that include both cooling and heating mode measurements.