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Why does everyone want to 'top up my freon' at the service? Does it actually get used up?

Editorial guide · Updated 18 September 2026

In short Short answer: no, refrigerant is not consumed; the circuit is closed and sealed, and if some is missing there is a leak that must be found and repaired, not 'topped up' every year. A maintenance service involves no work on the refrigerant circuit at all – we do not do it, it is not our job.

This page explains a situation in an editorial format. It is not an open discussion board or a verified customer review. Contact us on WhatsApp about your own appliance.

Situation discussed

House in Bragadiru, three 12,000 BTU Mitsubishi units installed 6 years ago. The units cooled fine before too. I suspect I am being taken for a ride. Does freon get used up like engine oil? See current rates on the Prices page.

Editorial explanation · Revizie AC

What is really happening

A split that 'needs freon' every year either has a genuine leak (and a top-up is an expensive postponement) or does not need any and someone is selling something invisible. What really reduces the capacity of a 6-year-old unit is dirt: a clogged outdoor coil raises condensing pressure and cuts efficiency, and an evaporator covered in biofilm no longer transfers heat. The symptoms – cools slowly, runs longer – mimic 'low refrigerant', which is why it sells so easily. A correct service checks what can be seen: coils, fans, drain, temperature split, electrical connections (visually), not what cannot.

Explanatory diagramFour services, different purposes
Four services, different purposes
  1. Inspection: assessing condition and symptoms.
  2. Service check: checks and measurements appropriate to the unit.
  3. Cleaning: removing deposits.
  4. Sanitising: suitable treatment of cleaned surfaces.

The actual scope is confirmed before the visit.

What the studies say

What we do on site

  1. We measure the temperature split on each unit before touching anything – we write the values down.
  2. Each indoor unit: sealed waterproof cover, hose to the bucket, alkaline cleaner plus adjustable pressure wash of evaporator and roller, drain pan and hose flushed, sanitising.
  3. The three outdoor units in the yard: condenser washed in place, at low pressure so we do not flatten the fins.
  4. We restart and measure the split again: cleaning alone usually recovers 2–4 °C.
  5. If a unit still cools poorly after cleaning, we tell you honestly that it looks like a refrigerant problem and needs a refrigeration technician – we do not fix it and we do not sell refrigerant.
  6. See current rates on the Prices page.

What you can do yourself

  • Ask anyone who wants to top up refrigerant to show you the gauges and explain where the leak is.
  • Check whether the outdoor unit is clean – after 6 years in a yard it certainly is not.

What NOT to do

  • Do not pay for annual top-ups without a leak diagnosis.
  • Do not equate 'cools less' with 'low refrigerant' before the unit is clean.

Prevention

Annual cleaning of all three units, filters every two weeks – well-kept Mitsubishi units run 15 years without 'asking for freon'.

When to call us

For a maintenance service with no upsell: 0764 012 943, WhatsApp works. Bragadiru is inside our coverage area.

Technician explaining to the customer what he found in the unit
Technician explaining to the customer what he found in the unit
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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.