If space heating works but hot water does not, the problem may be a schedule, sensor, diverter valve, cylinder or control issue rather than a complete heat-pump failure.
Separate the symptoms
Check whether radiators or underfloor heating still warm up. This distinction narrows the investigation and helps a technician prepare.
For a Cork home, note the system make, model and the conditions when the issue appears. Clear information reduces guesswork and helps the person returning your call decide whether the visit should be routine maintenance or fault diagnosis.
Safe homeowner checks
Check the controller schedule, target temperature and any displayed code. Confirm nobody has switched the hot-water programme off. Do not remove covers or force valves.
For a Cork home, note the system make, model and the conditions when the issue appears. Clear information reduces guesswork and helps the person returning your call decide whether the visit should be routine maintenance or fault diagnosis.
When to call
Request help when the issue persists, returns after a permitted reset, or is accompanied by a leak, electrical smell or unusual noise.
For a Cork home, note the system make, model and the conditions when the issue appears. Clear information reduces guesswork and helps the person returning your call decide whether the visit should be routine maintenance or fault diagnosis.
What to report
Provide the make, model, code, cylinder type if known, when hot water last worked and whether an immersion heater is available.
For a Cork home, note the system make, model and the conditions when the issue appears. Clear information reduces guesswork and helps the person returning your call decide whether the visit should be routine maintenance or fault diagnosis.
What to ask before the visit
Ask what the quoted visit includes, whether VAT and travel are included, what record you receive, and how additional work will be approved. Confirm experience with your exact system. Do not assume brand authorisation, qualifications, warranty protection or response time unless the appointed business confirms it in writing.
Prepare useful information
Write down the make and full model number from the rating plate, the exact controller message, which functions still work, and when the problem began. Note whether it follows a power cut, a settings change, very cold weather or recent work elsewhere in the heating system. If the fault is intermittent, a short video or photograph taken from a safe position may help. Keep the outdoor and indoor equipment accessible, but do not remove covers.
For a routine service, gather the installation handover and previous reports. For a repair, describe the active symptom when booking so the correct amount of diagnostic time can be allowed. Ask the operator to explain findings and seek approval before fitting chargeable parts.
Useful next step
If you still need help, read the heat pump repair guide or request a callback. For another homeowner question, browse the heat pump guides.