Minisplit Maintenance Costs and Schedule
What’s a reasonable expectation for how often a mini-split needs to be serviced? And what’s a reasonable cost per unit? How often do units develop noise issues after cleaning?
I’m asking because we’re being told that our units (ceiling mounted Mitsubishi one-way ductless, MLZ) will need to be cleaned very two years or so. And the cost is ~$400 a unit. We have six units, so that would be $1,200 a year, averaged. Not to mention the hassle of scheduling/accommodating messy cleaning.
We had cooling issues, they inspected the coils and noted lots of dust in them, explaining that causes lowered performance (and hence they were cooling adequately).
Now, all of two weeks later, two of the cleaned units have developed loud buzz noises. The diagnosis is that the sealed motor units need to be replaced. And that happens fairly frequently, which is why the cleaning cost is high … Oh, and it’ll be 10 days until they can be fixed (can’t sleep in the bedroom again …)
I had hoped that the dust issue was to do with un-level ceilings causing by-passing of the filter, something now fixed (by adding ugly weather stripping). But now they are saying that even wall mounted units have a similar schedule and tendency for the motor to need replacing after cleaning …
So I’m looking for some experience here? Are all units this way? Is it just the MLZ units? Or is this the result of bad installation and/or bad cleaning?
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