Heat pump not defrosting — Valencia, Valencian Community
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 Valencia
Valencia averages 300+ sunny days per year and summer temperatures regularly exceed 35 °C, making air conditioning near-essential rather than optional — AC failures in July–August are true emergencies. The city's proximity to the sea creates a corrosive saline air environment that degrades outdoor condenser units faster than inland locations. F-Gas certified technicians are required by law for refrigerant handling (RD 115/2017), and demand for certified installers spikes sharply in spring, creating booking waits of 2–4 weeks.
Who to call
For this problem in Valencia, call a: Klimaattechnicus
Vind een Klimaattechnicus in ValenciaSymptoms 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 Valencia
Emergency services in Valencia respond within 30–90 minutes in the city core (faster in l'Eixample and Ruzafa, slower in outlying districts). Callout rates run €50–€130 plus €35–€65/hour including IVA. Post-DANA (November 2024) contractor availability in the southern metro area (Horta Sud) remains constrained due to ongoing flood remediation work — expect longer waits and higher rates for any flood-zone adjacent property.