The outdoor unit is on the facade, 6th floor – how do you clean it? Is it worth including?
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Rahova, 8-storey block, the outdoor unit is fixed to the facade under the window on the 6th floor, no balcony. Indoors is a 5-year-old 12,000 BTU Gree. At the last 'service' the guy said 'the outdoor unit can't be reached' and cleaned only the indoor one. How do you go about it and what do I lose if the outdoor unit stays dirty?
What is really happening
The condenser coil of a facade-mounted split faces the wall (air is drawn through the back and sides and blown out the front), so dirt collects on exactly the side you cannot see. Five years of Rahova boulevard dust forms a grey layer that raises condensing pressure and reduces capacity; condenser fouling research documents this loss. It is a real part of the unit's efficiency – which is why for us the outdoor unit is included, not optional.
- Keep the air intake clear.
- Do not obstruct discharged air.
- Service access and clearances depend on the manual and location.
- Fouling of the outdoor condenser raises pressure drop and condensing pressure, reducing the split unit's capacity and efficiency. [Science and Technology for the Built Env, 2019]
- Replacing a dirty, clogged filter with a clean one can lower an air conditioner's energy consumption by 5–15% (US DOE). [US Department of Energy – Energy Saver, 2024]
- The evaporator and condenser coils accumulate dirt over time and should be checked every year and cleaned as necessary (US DOE). [US Department of Energy – Energy Saver, 2024]
What we do on site
- Indoor unit in full: sealed double cover, hose to the bucket, alkaline detergent, adjustable pressure wash, pan and hose, sanitising, filters.
- Outdoor unit from the window: unit off at the breaker, harness/anchoring for the technician, long lance, condenser detergent applied to the coil through the back and sides, contact time.
- Wide low-pressure jet wash along the fins; fan blades through the front grille.
- Visual check of connections and the electrical box cover, bracket condition (rust, bolts) – we tell you what we see.
- If we cannot reach the coil decisively, we say so and take the outdoor part off the price. See current rates on the Prices page.
What you can do yourself
- Once a year, look at the unit from the window with a mirror or your phone on selfie: if the back is uniformly grey, it needs washing.
- Do not leave outdoor blinds or objects against the unit – they block its intake.
What NOT to do
- Nobody climbs on the sill without anchoring – not you, not a 'resourceful' technician.
- Do not accept 'it can't be done' without at least an attempt with a lance from the window.
Prevention
Outdoor unit washed yearly with the indoor one; on a facade there is more dust than on a balcony, not less.
When to call us
0764 012 943, WhatsApp with a photo of the unit from the window so we know what access we have; Monday–Saturday 08:00–20:00; Rahova is 15 minutes away.
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Sources (3)
The information on this page is educational and based on cited sources; it does not replace medical advice. We do not do repairs, installation or refrigerant circuit work.