Greenstone · Priority
Heat Pump Icing Up in Greenstone
Ice forms on the evaporator coil and does not clear between cycles. This page covers how we diagnose and repair it on heat pumps in Greenstone.
This fault is normally treated as priority work because the plant is still running but is damaging itself or wasting energy while it does.
Retail, medical and residential development with centralised hot water systems. Gauteng municipal water is moderately hard, so scale on elements and heat exchangers is the single most common cause of falling performance.
- Area
- Greenstone, East Rand
- Equipment
- Heat pumps
- Call
- 069 268 0988
What we find here
Likely causes
- Defrost sensor or board failure
- Low refrigerant charge
- Restricted airflow from a dirty coil
- Fan motor running slow or intermittently
- Unit sited in a cold, unventilated position
How it is confirmed
Diagnostic sequence
- Observe a full defrost cycle
- Check defrost sensor resistance
- Airflow and coil condition inspection
- Charge verification
Repair route
Repair services in Greenstone
Heat Pump Repairs Greenstone
Fault-finding and repair of air-source hot water and pool heat pumps.
Industrial Heat Pump Repairs Greenstone
High-capacity and cascade heat pump repairs for plants and process water.
Commercial Heat Pump Repairs Greenstone
Hotel, guesthouse, gym and complex heat pump repairs with minimal downtime.
Heat Pump Maintenance Greenstone
Scheduled servicing that keeps COP high and prevents compressor failure.
Heat Pump Installation Greenstone
Sizing, plumbing, electrical and commissioning for new heat pump plant.
Heat Pump Regassing Greenstone
Leak detection first, then correct-charge regassing by weight.
Coverage
Nearby areas
- Heat Pump Icing Up Bassonia Rock
- Heat Pump Icing Up Mondeor
- Heat Pump Icing Up Mondeor Ext
- Heat Pump Icing Up Mondeor Ridge
- Heat Pump Icing Up Mulbarton
- Heat Pump Icing Up Mulbarton Ext
- Heat Pump Icing Up Meyersdal
- Heat Pump Icing Up Meyersdal Eco Estate
- Heat Pump Icing Up Meyersdal Nature Estate
- Heat Pump Icing Up Meyersdal Crest
FAQs
Frequently asked questions
What causes heat pump icing up?
The usual causes are defrost sensor or board failure, low refrigerant charge, restricted airflow from a dirty coil, fan motor running slow or intermittently. Which one it is can only be confirmed by measurement, not by symptom alone.
How do you diagnose it?
Observe a full defrost cycle; Check defrost sensor resistance; Airflow and coil condition inspection; Charge verification. The readings are recorded so the repair decision is based on data.
Can I keep using the system in the meantime?
Usually yes, for a short period, but efficiency and component life are both being lost while the fault persists.
Do you attend this fault in Greenstone?
Yes. Ekurhuleni call-outs are grouped by area so industrial and commercial visits can be attended on the same run. Medical facility hot water compliance checks available.
Heat Pump Icing Up — Greenstone
Medical facility hot water compliance checks available.