Grant Aerona Servicing & Repair
Servicing, fault-finding and repair for Grant Aerona³ and Aerona 290 air source heat pumps across Orpington, Bromley, Sevenoaks and the Kent villages. £190 with no VAT.
Aerona Servicing
- £190 full annual service, no VAT
- £285 heat pump + cylinder together
- Aerona³ & Aerona 290
- Fault history read on site
- Any installer
Aerona³ and Aerona 290
Grant is best known for its oil boilers, and plenty of Aerona heat pumps went in to replace one. That history matters: a system designed around an oil boiler's hot flow temperatures doesn't always suit a heat pump without some changes.
The Aerona³ range uses R32. The newer Aerona 290 uses R290, a natural refrigerant, with outputs from about 4kW to 15.5kW and flow temperatures up to 75°C for heating. Grant quotes a seven-year product guarantee on the Aerona 290, subject to its terms and conditions.
What I Check on an Aerona
Radiators and flow temperature
If the radiators were sized for an oil boiler running hot, the heat pump may need a higher flow temperature than is efficient to keep up. I check whether rooms reach temperature, at what flow temperature, and where an upgraded radiator would make the biggest difference.
Fault history on the controller
Aerona³ faults show as a code on the remote controller with a warning symbol and a flashing red light on the on/off switch, and a two-digit code also appears on the heat pump's terminal circuit board. I read both, and the history, before deciding what to test.
Pressure, vessel, strainer and filter
Flow problems on any heat pump usually start on the water side, so these are checked and cleaned on every visit.
Frost protection
Outdoor pipework on rural installations can be exposed. I check how your system is protected against freezing and that the protection still works.
Hot water and the cylinder
Most Aerona installations heat an unvented cylinder. I'm G3 qualified and service both together for £285.
Grant Aerona Fault Codes
Grant publishes the full list of Aerona³ fault codes, with checks for each, in the Fault Finding section of its installation and servicing manual. Grant's own advice to homeowners is to contact their installer or a heating engineer promptly so a fault doesn't get worse.
That's sensible. What I'd add: write the code down, note whether the unit was heating, making hot water or defrosting at the time, and whether it cleared by itself. Then call me — I'll tell you if it needs a visit or if there's something simple to check first.
Oil-to-Heat-Pump Homes: What Usually Needs Attention
Old pipework and sludge
A system that ran on an oil boiler for years can carry sludge, which ends up in the heat pump's strainer and plate heat exchanger. I check the water quality and tell you whether a clean is worth doing.
Hot water expectations
Oil boilers reheat a cylinder fast. A heat pump reheats more slowly and works best on a schedule. Setting that up properly usually ends the "not enough hot water" complaints.
Rooms that never quite warm up
Usually one or two undersized radiators. Changing those is far cheaper than running the whole system hotter all winter.
Running costs
Weather compensation and a lower flow temperature are where the savings are. I set them up with you, not around you.
Prices and What You Get
A full annual service of your Aerona is £190 with no VAT, with a written report. If you have an unvented cylinder, servicing both in one visit is £285 — £45 less than booking them separately.
Fault-finding visits are priced before I come out, and if a part is needed you get a fixed price before anything is ordered.
I'm not VAT-registered, so the figure I give you is the whole price.
Grant Aerona Questions
Book Your Aerona Service
£190 with no VAT, written report every visit, across Orpington, Bromley, Sevenoaks and the Kent villages.
07717 846247
Other Heat Pumps I Service
Brand guides and the faults I see most.