NO - as air conditioning systems use fluorinated gases as refrigerants, all work on them must be done by professionals holding valid F-Gas certification. There is a range of different qualifications and certifications that apply for this, so it's always best to ask someone who is qualified to do this.
Holywood
Holywood is a town in the city of Belfast in County Down, Northern Ireland. It is a civil parish and townland comprising 755 acres resting on the shore of Belfast Lough, between Belfast and Bangor. Holywood Urban Area is classified as a medium town within the Belfast Metropolitan Urban Area (BMUA) by the Northern Ireland Statistics and Research Agency, with the 2001 Census documenting a permanent population of 12037. Within this population, around 20 per cent are aged under 16 years of age and 21 percent were aged 60 and over. 50.6 per cent of the population is male and 49.4 per cent is female. The railway line from Belfast to Holywood arrived in 1848, and this brought about swift development. This development, in combination with that of surrounding towns and villages along the seaside strip to Bangor, demanded the development of the Holywood Bypass in the early 1970s. The town is a popular house and is distinguished for its classy shops, boutiques, arts and crafts. Holywood is most popular for its maypole at the crossroads in the centre of town. Its origin continues to be rather vague, but, in accordance with local legend, it derives from 1700, when a Dutch ship is said to have actually run aground on the shore close by, and the crew put up the damaged mast to display their appreciation of the assistance offered to them by the townsfolk. The maypole continues to be in regular use for dancing at the annual May Day fair. The town also holds an annual jazz and blues festival. There are a lot of sporting possibilities in Holywood, being the home of football clubs, golf clubs, cricket clubs and an athletics association. For all of your home upgrades, make certain to make use of dependable professionals in Holywood to make certain of quality.