My 4 aircon and compressor are more than 10 yrs old. I'm thinking of changing it but I do not want to teardown my cabinets to replace the pipes.
is it possible just to change the aircons and compressor only?
I got the Mitsubishi Heavy Industry, exactly 5 years of usage. I never go for any services before since the last installation, as I will just DIY myself on: cleaning of the filter and the blower.
I do that in every 3-4 months but until recently noticed after the cleaning of the blower, the air blow wasn't cool enough at the night. Not sure what's the problem causing this, I would said my air-con is still functioning well w/o any leakage or break down. Any one facing the similar problem before?
Good job on doing your own upkeep.
Based on description it seems that either your unit is lacking in gas or the coils are dirty.
Is the air emitted as strong as previous when the unit was cold?
If the air is as still strong as previous, chances are your unit might be lacking in gas.
Otherwise if the strength of the air emitted is reduced, chances are the coil is dirty. For Mitsubishi Heavy Industry, the unit has a V-Coil which cannot be reached unless the unit is dismantled hence even with the regular upkeep of filter and blower, the coils will eventually get dirty and affect the cooling efficiency.
You might want have your contractor do a check on this to confirm.
My setting was at "Med" all the while and the room will be cool down within the 10 mins. Last night setting at "Auto and Hi", the air emitted still as strong as previously, only the air was not cool enough and the room was unable to cool down even after 1 hr. I will try to monitor the situation tonight. If I would like to do the checking and top up for the gas, how much will be the current market rate?
Then this price is reasonable.