Heating, Air Conditioning, Fridge, HVAC/mini split ac


one year ago we built an efficiency here in florida & a mitsubishi mini split air conditioner was installed.. we have just returned from a 5 month trip (whilst away we left the ac at 78 deg) we returned to find a terrible musty smell and a fine white mold growing on the furniture etc..plus the ac unit was thick w/ black mold everywhere inside.. upon inspection the ac technician said this was due to the holes (where the air lines come through the wall that were neglected to be filled w/ foam upon the initial installation and were therefore not sealed, pulling in wet air from outside..
they are coming back tomorrow to clean the unit..

my question is, has my unit been working overtime b/c of this, putting undue strain upon it and therefore has it used more electricity during this time?
should i request a new unit?
please help :(

I doubt it, but replacing the indoor section might be the only way to be sure it's free of mold.

You should consider bringing in an Industrial Hygienist who specializes in mold studies, to go through the efficiency and the AC, to make sure it's safe to live there.


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Fred Weldin


I can't help you if your whatsis won't work, people (Especially if it's a refrigerator); I have no experience with appliances, and I haven't been involved with H&AC service and repair since March 08, 1996 (Thank the Lord); I always send a "standard" reply to appliance questions and H&AC "Service and Repair" questions (about 20 a month), so if you want to know why your whatsis isn't working like it used to, ask someone else. A lot of my answers arenít read by the questioners; in that event, I always send reminders to read the answers for a month or more (the word "idiots" comes to mind - actually there's another more appropriate word, but discretion prevents its use here). If you have questions about how big a unit you need, if one room's warmer than the others, if you want an opinion oas to scope of work on bids received, etc. just ask. Do visit www.askweldin.com, there's a lot of good information on sizing, ductwork, efficiency, as well as some techniques accomplished DIY-ers can use to troubleshoot and improve their H&AC. Finally, I want to thank all of the kind, serious people whom I meet here: I enjoy working with you. My wife says I'm "snarky" from time to time; as for you others, please use your imagination as to the responses swirling on the snarky side of my brain when I read your questions.


53 years in the business. See www.askweldin.com


B of ME U of D 1965, numerous classes, seminars and a lot of "Hands On" learning since.

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