Keep your Air Source Heat Pump running at its best. Expert annual servicing, fault diagnosis and repair, and efficiency optimisation for all major brands — across Orpington, Bromley, Kent and South East London.
Smith EcoFlow services, repairs and optimises air source heat pumps across Orpington, Bromley, Sevenoaks and Kent. A full annual service is £170 with no VAT; combined with an unvented cylinder service in the same visit it is £270. Work covers system pressure and expansion vessel, glycol and freeze protection, circulating pump, strainers, flow and return temperatures under load, weather compensation and control settings, evaporator coil, condensate and electrics, with a written performance report. All major brands are serviced regardless of who installed them, including Mitsubishi Ecodan, Daikin Altherma and Vaillant aroTHERM. Gary Smith holds ASHP Level 3. Book on 07717 846247.
A homeowner had been quoted separately by two firms for the same house — one for the heat pump, one for the cylinder. Both were serviced in a single visit for £270 rather than £170 and £140 booked apart, with a written record for each and the Benchmark logbook completed. One engineer saw how the whole system was actually performing, not half of it.
Read the full case study →Whether your system needs its annual service, has developed a fault, or simply isn't performing like it should, we've got it covered.
A thorough yearly service that keeps your heat pump efficient, reliable and warranty-compliant.
Not heating properly, making odd noises or throwing error codes? We find the fault and put it right.
Running costs higher than promised? We tune the settings most installers never get right.
A proper heat pump service takes time. If an engineer is in and out in twenty minutes, they haven't done the job. I work through a full checklist on every visit — because a heat pump is a sophisticated bit of kit, and it deserves proper attention.
You'll get a full written service record afterwards — the documentation your manufacturer needs to keep your warranty valid, and a clear account of everything I checked and how your system is performing.
I service Air Source Heat Pumps from every major manufacturer, whoever installed them, right across Orpington, Bromley and Kent.
Written by Gary Smith. I service heat pumps across Orpington, Bromley and Kent. What follows is based on faults I've found on real systems, not a manufacturer's brochure.
This is the most common complaint I get, and the cause is very rarely a faulty heat pump. It is almost always how the system was set up.
A heat pump's efficiency depends heavily on flow temperature — how hot it pushes water round your radiators. Every degree higher costs you efficiency. Many systems are commissioned at 50°C or more because it is quick and the house warms up fast on handover day, when the same house would run perfectly happily at 40–45°C and use noticeably less electricity.
Weather compensation is the other big one. It lets the heat pump raise flow temperature only as the outside temperature drops, instead of running flat out all winter. It is built into virtually every modern unit — and it is switched off, or set up wrong, on a great many of the systems I visit.
The signs are consistent: flow temperature fixed high, weather compensation disabled, the heat pump cycling on and off frequently rather than running steadily, radiators that were never resized for lower flow temperatures, and a system pressure or expansion vessel that was never set correctly at handover. Individually each is minor. Together they can mean a heat pump costing far more to run than it should, while the owner concludes the technology does not work.
A heat pump system needs the right pressure and a correctly charged expansion vessel to absorb expansion as the water heats. If the vessel has lost its charge — and they do, over time — pressure swings wildly, the relief valve starts passing, and you find yourself topping the system up regularly. Repeated topping up introduces fresh oxygenated water, which causes corrosion and sludge, which then blocks the heat exchanger. It is a slow-motion failure that starts with something as simple as an uncharged vessel, and checking it is part of every service I do.
Nearly all new heat pumps now use R290, and the rules around it are different. Almost nobody explains this properly.
R290 is propane — a natural refrigerant, and not an F-Gas. That matters, because the F-Gas Regulations that govern conventional refrigerants do not apply to it in the same way. Different rules, different handling requirements.
Monobloc heat pumps have a factory-sealed refrigerant circuit. The entire refrigerant circuit is contained within the outdoor unit and is not opened during servicing — there is no refrigerant pipework running into your house, and a service never breaks into the circuit. Anyone telling you they need to open it for a routine service is mistaken.
So what does a proper annual service on an R290 monobloc actually cover? The water side and the electrics, which is where the faults genuinely occur: system pressure and expansion vessel charge, glycol concentration and freeze protection, circulating pump operation, strainer and filter cleaning, flow and return temperatures measured under load, weather compensation and control settings reviewed, evaporator coil cleaned, condensate drainage checked, electrical connections and isolators inspected, and a full performance test with the results recorded.
Clear, fixed prices with no VAT to add. You know exactly what it costs before I start.
No VAT · Full annual service
Keeps your warranty valid and your system efficient
No VAT · Both serviced in one visit
Save £40 versus booking separately
No VAT · G3 annual service
Legal safety check for Megaflo & all brands
Repairs and optimisation visits are quoted after diagnosis — always a fair fixed price agreed before any work starts. I'm not VAT-registered, so there's no VAT on top.
Here's something a lot of people don't realise: many heat pumps are never set up correctly when they're installed. The flow temperature is left too high, weather compensation is switched off, and the controls are on factory defaults. The system works — but it's quietly costing you far more to run than it needs to.
My optimisation service tunes all of this — often cutting running costs noticeably, and usually without fitting a single new part. If your bills have been higher than you were promised, this is very often why.
Whoever made your system and whoever installed it, we can service and repair it.
Noticed any of these? It's worth getting your system looked at before a small issue becomes a big one.
Bills creeping up for no obvious reason often point to a system that's drifted out of tune.
Rooms slow to warm up, or never quite getting there, is a classic sign a service is overdue.
Rattling, grinding or new vibrations from the unit shouldn't be ignored.
Fault codes on the display mean the system wants attention — I can diagnose what they mean.
If it's been more than a year — or you've never had it done — you're overdue and risking your warranty.
Switching on and off frequently wastes energy and wears the system out faster.
Genuine 5-star reviews from real heat pump jobs across Orpington and Kent.
"Smith EcoFlow came and repaired and serviced my Air Source Heat Pump for me today. He spent a full hour servicing it and tuning it up. I explained to Gary that lately it wasn't heating up like it used to. He made the necessary adjustments and service, and it's never run so well. We are back to having heat again in the house. Definitely a 5 star from me."
"Thank you for the ASHP service — getting my heating working amazingly well. Great value."
What a proper annual service involves, and why it matters for your warranty.
How the government grant works and whether your home qualifies.
Why the two work so well together for efficient, even warmth.
See a Croydon job where both were serviced in one visit, saving a second call-out.
Read the Case StudiesDedicated pages for the areas, manufacturers and faults I deal with most.
The water side and the electrics — where the faults actually are.
The chart plots flow temperature against outside temperature, with colder conditions to the right. A red dashed horizontal line shows a system with weather compensation switched off: it runs at a fixed high flow temperature regardless of the weather, which wastes electricity on milder days. A green sloping line shows a weather compensated system: on a mild day it runs at a lower flow temperature, which is more efficient, and it raises the flow temperature only as the outside temperature falls. The curve shown is illustrative only; the correct settings depend on your property, its heat loss and the size of your radiators or underfloor system.
Keep your system efficient, warm and warranty-protected. Get in touch for a service, a repair, or an honest chat about why your running costs are higher than they should be.
call07717 846247