Service, Cleaning and Repair of DOMETIC Standalone Air Conditioners – Practical Tips
Service, Cleaning and Repair of DOMETIC Standalone Air Conditioners – Practical Tips
Standalone air conditioning is essential in specialist vehicles, campers, trucks, and construction machines. Its operation independent of the engine ensures thermal comfort during stops, but – like all cooling devices – it requires regular maintenance and servicing.
At HESTA, we have specialized for years in repairing and servicing standalone air conditioners by DOMETIC, including the most popular FreshJet series models (FJ2200, FJ2600, FJ3000), the newer FJX3, FJX5, FJX7 models, and older models like B2200, HB2500, B1901, B2100, and B1600.
Below we share practical tips based on our long-standing service experience – derived from hundreds of repairs performed at our facility in Radom.
Why is servicing a standalone air conditioner so important?
Regardless of the model, every standalone air conditioner should undergo regular cleaning and inspection. Neglecting these activities can lead to:
- reduced cooling efficiency,
- unpleasant odors from the evaporator,
- unit overheating and controller failure,
- permanent damage to fans and electronic modules.
At HESTA, we recommend performing a unit inspection at least once a year – preferably before the summer season.
DOMETIC FJ3000 – filter and evaporator cleaning step by step
The DOMETIC FreshJet FJ3000 model is one of the most frequently serviced devices at our company. Due to its design, servicing requires precise but feasible disassembly of internal components. We recommend:
- removing the interior panel (from the diffuser) and filter covers,
- thoroughly rinsing the air filters in lukewarm water,
- cleaning the evaporator with compressed air,
- using an antifungal agent and performing ozonation.
We have also published an instructional video showing the entire cleaning process step by step – the link is at the end of the article.
Servicing vs. Repair – what can be done independently and what should be outsourced?
As part of basic maintenance, the user can:
- clean filters and ventilation channels,
- check the remote control and proper functioning of the operating modes,
- visually inspect the external and internal units,
- check the condensate drain – which is very important but often overlooked.
However, in case of problems such as:
- no cooling despite compressor operation,
- refrigerant leakage,
- unstable controller operation or damaged control board,
- seized fans or power issues with 12/24/230V,
a professional diagnosis is required. Our service center is equipped to perform full unit regeneration, refrigerant recovery, pressure line soldering, and post-repair testing.
Overview of popular DOMETIC air conditioner models
FreshJet Series (FJ)
- FJ1700 – compact roof model with 1700 W cooling power, designed for vehicles up to 6 meters. It has a heating function and can operate while driving.
- FJ2200 – very popular model for campers and trailers, compact and efficient.
- FJ2600 – higher performance than FJ2200, quiet operation, and low energy consumption.
- FJ3000 – high-performance model for large vehicles, robust design, advanced controls.
FreshJet X Series (FJX)
- FJX3 – modern model for medium-sized vehicles, quiet and efficient.
- FJX5 – designed for larger motorhomes, with advanced controls.
- FJX7 – the most powerful in the series, intended for large vehicles and extreme conditions.
Other DOMETIC Models
- B1600 – compact and reliable, though with limited cooling power.
- B2200 – older roof model, still popular in older campers and trailers. Often requires control board repair and fan replacement. Also used in specialist vehicles.
- B1901 / B2100 – durable older generation models, still in use in recreational vehicles.
- HB2500 / HB3500 – under-bench units, more difficult to service but still repairable.
Summary and Contact
HESTA's many years of experience in servicing DOMETIC air conditioners allow us to effectively diagnose, repair, and educate users on the preventive maintenance of these devices. Regular maintenance – especially of filters and the evaporator – significantly extends unit lifespan and minimizes the risk of failure.
If your device requires inspection or repair, feel free to contact us: sklep@hesta.pl