Randfontein · Priority
Heat Pump Icing Up in Randfontein
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 Randfontein.
This fault is normally treated as priority work because the plant is still running but is damaging itself or wasting energy while it does.
Mining and industrial sites with boiler plant and bulk hot water requirements. Where a site runs on borehole water, hardness and iron content shorten service intervals considerably and are worth testing before setting a maintenance plan.
- Area
- Randfontein, West 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 Randfontein
Heat Pump Repairs Randfontein
Fault-finding and repair of air-source hot water and pool heat pumps.
Industrial Heat Pump Repairs Randfontein
High-capacity and cascade heat pump repairs for plants and process water.
Commercial Heat Pump Repairs Randfontein
Hotel, guesthouse, gym and complex heat pump repairs with minimal downtime.
Heat Pump Maintenance Randfontein
Scheduled servicing that keeps COP high and prevents compressor failure.
Heat Pump Installation Randfontein
Sizing, plumbing, electrical and commissioning for new heat pump plant.
Heat Pump Regassing Randfontein
Leak detection first, then correct-charge regassing by weight.
Coverage
Nearby areas
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 Randfontein?
Yes. West Rand visits carry a fuller van stock because parts runs back to Johannesburg cost time. Water quality testing is included with maintenance in this area.
Heat Pump Icing Up — Randfontein
Water quality testing is included with maintenance in this area.