Modern air source heat pumps from Samsung, Vaillant, and Ideal need regular light upkeep by you and an annual professional service to stay efficient and within warranty. Day-to-day work is mostly keeping the outdoor unit clear and checking filters; the refrigerant circuit stays sealed and is handled by qualified engineers. After UKEM handover, this checklist is what most mainland Britain homeowners do between optional service visits.

At a glance

Homeowner tasksClearance, filter, visual checks
Professional serviceTypically once a year
Defrost in cold weatherNormal for short periods
Do not DIYRefrigerant circuit, electrical internals
Docs to keepMCS cert, warranty, service records

Outdoor unit: keep airflow clear

The outdoor fan needs unobstructed intake and discharge. In practice:

  • Leave at least 1 m clear in front of the fan grille where possible (more is better; the noise guide explains why siting matters for neighbours too).
  • Trim back shrubs that grow into the airflow path each spring.
  • Remove autumn leaves from the grille; do not use a pressure washer on the coil fins.
  • After heavy snow, brush loose snow away; let defrost cycles handle coil icing.

Ground-mounted units on anti-vibration feet, as on many Ideal HP290 installs, still need a level pad and free drainage for condensate. Blocked drains can trip fault codes or ice up the tray in winter.

Indoor side: filters and controls

Air-to-water systems also have indoor components: hydro unit, cylinder, pumps, and controls. Your handover pack lists the filter or strainer location and cleaning interval. Many households check every three to six months and rinse or replace as the manufacturer specifies.

Learn the wall controller or app basics at handover: heating mode, hot water schedule, holiday mode, and any quiet or night setback your model supports. Small setting changes beat calling an engineer for a schedule question.

Annual service: what it covers

A qualified service visit typically includes:

  • Visual inspection of outdoor and indoor units, pipe insulation, and condensate routing.
  • Filter and strainer check; coil cleanliness assessment without damaging fins.
  • Control and sensor verification; flow temperatures compared to design values.
  • Refrigerant leak check where the engineer is F-Gas certified (homeowners must not intervene here).
  • Fault history review and firmware updates if the manufacturer recommends them.

That parallels an annual boiler service for warranty and efficiency, but the skill set is heat pump and F-Gas, not Gas Safe. Book before the anniversary of commissioning if your warranty terms require it.

Defrost, noise, and cold snaps

In sub-zero weather the unit spends more time in defrost. You may notice short louder periods; that is expected. Extended lockouts, ice that never clears, or heating that fails to recover point to a service need, not a settings tweak.

If you are a light sleeper, mention it at survey stage: wall choice and quiet schedules on supported controllers reduce night running without skipping necessary defrost.

Paperwork and warranty

At handover UKEM provides MCS certification, commissioning data, and manufacturer warranty registration steps. Store them with:

  • BUS grant confirmation (if applicable).
  • Annual service invoices.
  • Any filter part numbers from the handover pack.

Manufacturer warranties on UKEM’s range run from about two to ten years depending on model and registration; workmanship cover terms are explained in your install pack separately from the product warranty.

Well-maintained emitters and insulation keep the heat pump in its efficient band. If a room feels cold after years of good performance, the issue may be air in radiators, a stuck TRV, or reduced airflow at the outdoor unit, not necessarily a failing compressor. The radiators guide explains sizing; the installation timeline shows what commissioning checked on day one.

Contact UKEM for service booking after install, or start with a heat pump quote if you are still at survey stage.

Frequently asked questions

Do heat pumps need an annual service like a gas boiler?

Yes. Manufacturer warranties for Samsung, Vaillant, and Ideal units UKEM installs typically expect an annual check by a competent engineer. The visit covers refrigerant circuit checks where applicable, filter and strainer inspection, control calibration, condensate routes, and verification that the unit is running at expected efficiency. Gas boilers need a Gas Safe service for the same warranty and safety reasons; heat pumps use F-Gas-qualified engineers for refrigerant work. UKEM can advise on service booking after handover.

What can I maintain myself between services?

Keep the area around the outdoor unit clear: no stacked logs, bins, or planting within the fan's airflow path. Brush leaves off the grille in autumn and gently clear snow if it blocks intake, without forcing ice off the coil. Check the indoor filter or strainer on the schedule in your handover pack (many models: every few months). Monitor the app or wall controller for fault codes and note anything that repeats after a power cycle. Do not open the refrigerant circuit yourself.

Is defrost normal on a heat pump in winter?

Yes. When outdoor coil temperature drops, the unit briefly reverses or stops the fan to melt frost. You may hear a change in fan note or see steam on cold mornings. A cycle that completes in a few minutes is expected. Ice that builds for hours, fault codes that lock the unit out, or warm weather icing suggests a service call. The noise guide explains that defrost can run louder for short periods.

Does maintenance affect my warranty?

Manufacturer product warranties (often two to ten years depending on model and registration) usually require proof of annual servicing and correct installation by an MCS-certified installer. UKEM's workmanship cover sits alongside that; keep MCS certificates, commissioning reports, and service invoices in one folder. Missing an annual service can complicate a warranty claim on the outdoor unit or compressor.

When should I call UKEM after install?

Call if fault codes persist after the troubleshooting steps in your manual, if hot water or heating fails completely, if you hear new vibration through the wall, or if water pools under the outdoor unit from a blocked condensate route. For BUS grant or MCS paperwork questions, use the contact route from your handover pack. Routine filter cleaning and keeping the garden clear do not need a visit.