Combination microwave with air fry
Russell Hobbs 4-in-1 25L Combination Microwave with Air Fryer
Model RHM2564 — United Kingdom
A 25-litre combination microwave whose air-fry function is nine fixed automatic programmes, eight of them frozen convenience foods.
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Where to get real advice for this machine
Almost everything that changes a cooking answer is a property of the architecture rather than the badge. This is a combination microwave with air fry, and the Combination microwave with air fry page carries the cooking guidance that actually applies to it.
On air-fry mode alone, treat it as an oven-style machine: 10–20% longer than a basket and a proper preheat. On a COMBINATION mode, no published air-fryer time applies at all — microwave energy cooks the interior on a completely different schedule, and the manufacturer's own combination charts are the only usable source. The turntable, where fitted, must usually be removed for air frying; check the manual, because the metal accessories some of these ship with must not be used in microwave modes.
Does it genuinely air-fry?
Partly — see the assessment
Assessed as partial. A supplied air-fryer tray elevates food on the higher wire rack, and the appliance has convection heating with a fan, so air does reach around the food. But no air-fry temperature is published at any point, the nine programmes are fixed, and a 25-litre microwave cavity has neither the air velocity nor the thermal recovery of a drawer. The manufacturer's own instruction to turn the food during eight of the nine programmes is itself evidence that the airflow does not do the whole job.
- Air reaches every surface of the food
What we know about this machine
Read from Russell Hobbs 4-in-1 25L Digital Combination Microwave with Air Fryer Function RHM2564 — Instructions (PDF), retrieved on 2026-08-13.
It is rated at 900 W, a modest rating, so it will take longer to come back to temperature after a cold load. It has a single cooking drawer, so everything in it cooks at one temperature for one time. It is sold as 25 litres, which measures the whole drawer including the space above the food that you must not fill.
The figures above are the manufacturer’s. What they mean for cooking is AirfryerHQ’s reading of them, not a measurement — nobody here has run this machine.
Size and capacity
- Advertised capacity
- 25 litresA volume, not a cooking area.
Power and heat
- Power
- 900 W
Setup and cleaning
- Cooking zones
- 1
- Supplied with
- Glass turntable, Grill rack, Air fryer tray
Retrieved from Argos's manual library for Argos product 954/6345.
10 figures we could not establish
Each of these says WHY it is missing. “Not recorded by the sources consulted” means the manufacturer does not publish it in the document we read — not that nobody looked, and not that the figure does not exist.
- Usable cooking area
- Not recorded by the sources consulted — Not published.
- Chamber
- Not recorded by the sources consulted — Not published.
- On the worktop
- Not recorded by the sources consulted — Not published.
- Weight
- Not recorded by the sources consulted — Not published.
- Power range as published
- Not recorded by the sources consulted — The 900W figure is the microwave output power specifically, not the appliance's total input.
- Temperature range
- Not recorded by the sources consulted — No air-fry or convection temperature range is published.
- Adjusts in
- Not recorded by the sources consulted — Not stated.
- Standby power
- Not recorded by the sources consulted — Not published by this manufacturer. Only one model in this catalogue publishes a standby figure at all.
- Preheating
- Not recorded by the sources consulted — Not stated for the air-fry function.
- Dishwasher safe
- Not recorded by the sources consulted — Not stated in the copy read.
What each setting actually does
Read from the manual. The marketing name is what is printed on the panel; the canonical capability is what the mode is in generic terms, so a reader can find advice written for somebody else’s appliance.
| On the panel | Canonically | Starts at | Settable range | Preheat |
|---|---|---|---|---|
| H-1 | Air fry | No temperature setting | Fixed — cannot be changed | Not stated |
| H-2 | Air fry | No temperature setting | Fixed — cannot be changed | Not stated |
| H-3 | Air fry | No temperature setting | Fixed — cannot be changed | Not stated |
| H-4 | Air fry | No temperature setting | Fixed — cannot be changed | Not stated |
| H-5 | Air fry | No temperature setting | Fixed — cannot be changed | Not stated |
| H-6 | Air fry | No temperature setting | Fixed — cannot be changed | Not stated |
| H-7 | Air fry | No temperature setting | Fixed — cannot be changed | Not stated |
| H-8 | Air fry | No temperature setting | Fixed — cannot be changed | Not stated |
| H-9 | Air fry | No temperature setting | Fixed — cannot be changed | Not stated |
- H-1: Frozen chips, 300g. Turn the food part-way through, as the manual instructs for eight of the nine.
- H-2: Frozen potato croquettes, 350g.
- H-3: Frozen calamari, 250g.
- H-4: Frozen onion rings, 250g.
- H-5: Frozen chicken nuggets, 350g.
- H-6: Frozen breaded chicken or fish fillets, 400g. The largest load any of the nine accepts.
- H-7: Frozen scampi, 250g.
- H-8: Roasted vegetables, 200g. The only one of the nine that is not a frozen convenience food, and the smallest load.
- H-9: Frozen mini spring rolls, 300g.
Error codes and display states
Only what this manufacturer publishes, and only for this manufacturer. A code means whatever the firmware author decided it means, and reading one across from another brand is the commonest way to misdiagnose a fault.
AirfryerHQ does not hold this code for this manufacturer. That is a statement about this catalogue and not about your appliance: most manufacturers publish no code table at all, and a code's meaning is specific to the firmware that produced it. Do not read a meaning across from another brand — check your own manual, and contact the manufacturer if it is not in there.
Cleaning this model
The parts this architecture has, what collects on each, and what its own manual permits. Full methods and prohibitions are on the cleaning pages.
| Part | What is on it | How often | Dishwasher |
|---|---|---|---|
| Basket | Ordinary residue after cooking | After every use | Depends on your model — check the manual |
| Trays and bake pans | Burnt-on residue | After every use | Depends on your model — check the manual |
| Interior of the chamber | Greasy film | After every use | Not removable, so the question does not arise |
| Interior of the chamber | Lingering smell | When it needs it | Not removable, so the question does not arise |
| Oven-style cavity | Greasy film | About weekly | Not removable, so the question does not arise |
| Heating element area | Carbonised deposit | About monthly | Not removable, so the question does not arise |
| Fan and air intake | Greasy film | About monthly | Not removable, so the question does not arise |
| Viewing window | Greasy film | About weekly | Not removable, so the question does not arise |
| Exterior and body | Greasy film | About weekly | Not removable, so the question does not arise |
| Controls and display | Greasy film | About weekly | Not removable, so the question does not arise |
The manual states the air fryer tray is for the air fryer function only. Its material prohibitions are architecture-specific and severe compared with a drawer machine: no metal pans, no metal handles, no metal trim, no wire twist-ties, no melamine, and only microwave-approved cookware.
Replaceable parts
AirfryerHQ holds no part records for Russell Hobbs 4-in-1 25L Combination Microwave with Air Fryer. That is a statement about this catalogue rather than about the appliance: every air fryer has a basket and most have a crisper plate, and the manual read for this model does not enumerate them in a way we could record. What can be replaced, and what to ask for covers the general case, including where to find the model number a parts desk will ask you for.
Recall and safety status
No recall known to us at the review date
No entry for this model was found in the OPSS product safety register when it was searched for air fryers on 13 August 2026. That is a statement about that search and not a clearance.
No verified recall or safety notice is currently recorded in AirfryerHQ for this appliance. That is a statement about this catalogue and not about the product: AirfryerHQ holds a small number of checked alerts and is not a copy of the UK register. Check the authority's own register before concluding that an appliance is unaffected.
The Office for Product Safety and Standards publishes the UK register of product safety alerts, reports and recalls on GOV.UK, and Electrical Safety First operates a recall checker for electrical appliances. Registering an appliance with its manufacturer is what makes a direct notification possible.
Finding the manual
No time or temperature is published for any of the nine air-fryer positions, so none of them becomes a cooking observation and none can be compared with another manufacturer's chart. The manual instructs the cook to turn the food part-way through eight of the nine, which is the appliance telling you its airflow does not do the whole job.
About this model
The catalogue's second combination microwave, which matters because that whole architecture previously rested on one manufacturer. Its air-fry function is not a temperature and a time: it is a menu of nine positions, each tied to one food at one stated weight on the higher wire rack, with neither number published. What it does establish is what this architecture is expected to be used for, and the answer is frozen convenience food.
Owning this machine
The questions that come after the cooking.
- Looking after itFive minutes a week and one check a month, nearly all of it about grease.
- What to clean it withIncluding which tool every manufacturer in this catalogue prohibits.
- The coating, and when a basket is finishedThe part that decides how long this appliance lasts.
- Replacing a part, and what to ask forWhere the model and serial numbers are, and why no order code appears here.
- Accessories, and whether you need themWith the verdicts first and no affiliate links anywhere.
- Repair, replace, or stop using itThe symptoms that mean stop now, and the ones that mean a part.