Water Pump Faults & Replacements
Water pump problems are very common in homes with storage tanks and booster pumps. Below are the most common faults, what they usually mean, and whether repair or replacement makes sense.
Pump won’t start
Likely causes:
- No power supply (trip, blown fuse, loose connection, faulty switch)
- Failed press control unit (very common)
- Failed capacitor (single-phase pumps)
- Motor or windings damaged/burnt out
- Pump seized (after standing unused or due to debris/rust)
Pump won’t stop running
Likely causes:
- Water leak on the system (toilets, taps, outdoor lines, irrigation)
- Non-return valve (check valve) not holding / letting pressure drop back
- Press control stuck “on” or not sensing pressure correctly
- Pressure tank bladder failed (if fitted) or tank pressure incorrect
- Pump not reaching pressure due to blocked filter/strainer or air leak on suction side
Pump keeps starting and stopping (short cycling)
Likely causes:
- Small leak causing pressure drop and constant restarting
- Press control too sensitive or failing
- Pressure tank (if fitted) has lost air charge or bladder is damaged
- Blocked inlet filter or partially closed valve
- Air trapped in the system / pump not primed correctly
Pump is noisy or vibrating
Likely causes:
- Worn bearings (often a sign the pump is near end of life)
- Cavitation (not enough water supply to the pump / suction restriction)
- Air leak on suction side (loose fittings, cracked pipe, failing foot valve)
- Debris in the impeller
- Pump not mounted securely or pipes touching walls (vibration transfer)
Low water pressure
Likely causes:
- Blocked filters/strainers or a partially closed valve
- Press control/pressure switch set incorrectly or failing
- Worn impeller (common on older pumps)
- Leaks on the system
- Wrong size pump for the property
Press control vs Pump: what normally fails?
In many call-outs, the actual pump is fine and the fault is the press control unit (automatic controller). If the pump is running hot, clicking, or acting erratic, it’s often quicker and cheaper to replace the press control than replace the whole pump.
Repair or replace?
Budget/Chinese pumps: If the pump is a low-cost brand and it’s noisy, leaking, or has a burnt motor, it’s often not worth repairing. Parts can cost nearly as much as a new pump and they don’t last as long.
Quality pumps (Pentax, Pedrollo, etc.): These are usually worth repairing if the motor is healthy. Common repairs like a new capacitor, seals, bearings, or a controller replacement can give a quality pump many more years of life.
How I can help
- Fault finding (pump vs press control vs leaks)
- Press control unit replacement
- Pump replacement and correct sizing advice
- Priming, valve checks, filter cleaning
- Leak checks causing constant pump cycling
Service area
Lapta – Alsancak – Karsiyaka
If your pump is playing up, send me a quick WhatsApp with a photo of the pump and controller, and a short description of what it’s doing (won’t start / won’t stop / noisy / low pressure). I’ll tell you the most likely cause and the best fix.
