Heat pump not defrosting — New York, New York
Heat pumps naturally build frost on the outdoor coil in cold weather, and they run automatic defrost cycles every 30–90 minutes to melt it off. When defrost fails, ice encases the entire outdoor unit, blocking airflow and destroying efficiency — you'll notice lukewarm air from the vents and the compressor running constantly. Common causes are a faulty defrost control board or timer, a stuck reversing valve (which flips the system to cooling mode temporarily to defrost), a bad defrost thermostat or sensor, or a refrigerant leak that alters coil temperature. An HVAC technician can diagnose the failed component, replace the board, sensor, or valve, and verify proper defrost cycling before ice damages the compressor.
Waarom dit veel voorkomt in New York
New York's humid summers and frigid winters push HVAC systems to their limits. Window AC units dominate older buildings without central air, and steam heating systems in pre-war apartments require specialized maintenance that fewer technicians can handle.
Who to call
For this problem in New York, call a: Klimaattechnicus
Vind een Klimaattechnicus in New YorkSymptoms to look for
- Thick layer of ice on the entire outdoor heat pump unit
- Lukewarm or cool air blowing from vents when set to heat
- Outdoor unit fan runs constantly but never switches to defrost mode
- Higher than usual electricity bills during heating season
- Compressor makes laboring or unusual sounds under heavy ice load
Spoeddienst in New York
Emergency home services in New York City are available 24/7 but come at premium rates — expect $150–$300+ per hour for after-hours plumbing or electrical emergencies. Response times average 45–90 minutes in Manhattan, longer in outer boroughs. Always verify the provider's NYC license before letting them in.