Heat pump icing up in summer — Den Haag, Zuid-Holland
Ice forming on the outdoor heat pump unit or indoor evaporator coil during summer cooling is a clear sign something is wrong — the system is overcooling the refrigerant below the freezing point of condensation on the coils. The most common cause is restricted airflow: a dirty air filter, blocked return vents, or a failed blower motor. Low refrigerant charge (from a leak) is the second most common cause — less refrigerant means lower coil temperature and ice buildup. Other causes include a stuck or failed defrost board (on reversing models), a dirty evaporator coil, or a malfunctioning thermostatic expansion valve (TXV). An HVAC technician checks refrigerant charge, inspects the filter and coil, measures superheat and subcooling, and fixes the root cause. Running a frozen system damages the compressor — turn it off and let it thaw before a technician arrives.
Waarom dit veel voorkomt in Den Haag
Het vochtige zeeklimaat maakt verwarming en ventilatie cruciaal in Den Haag; de energietransitie stuwt warmtepompen, isolatie en ventilatie hard, al beperken krappe kavels en monumenten soms de plaatsing van buitenunits.
Who to call
For this problem in Den Haag, call a: Klimaattechnicus
Vind een Klimaattechnicus in Den HaagSymptoms to look for
- Visible ice or frost coating on the outdoor unit's coil or refrigerant lines
- Indoor vents blowing warm air or barely any air at all
- Water dripping or pooling around the indoor air handler as ice melts
- System short-cycling — turning on and off every few minutes
- Unusual hissing or bubbling sound near the indoor coil (possible refrigerant leak)
Spoeddienst in Den Haag
Spoeddiensten in Den Haag reageren binnen 25–50 minuten; in Scheveningen en de kuststrook kan het iets langer duren. Spoedtarieven rond €80–€180 voorrijden plus €70–€130/uur incl. btw.