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Water in the humidifier should be changed daily. Empty the humidifier chamber in the morning after you wake up, and fill it with fresh distilled water in the evening before you go to bed.
Furnace humidifier filters should be changed at least every three months so they work efficiently. If not changed they trap dust and particles that can 'pollute' the air you breathe. http://yourfilters.com/
A bubble on a tire is caused by damage to the tire. It looks like a bump on the tire and should be replaced.
Typically, a humidifier comes with a gauge or indicator of some sort to let you know when its filter needs to be changed. Sometimes, though, these gauges break or just aren’t as accurate as would be desired. There are ways to tell if a humidifier filter needs changed without using a gauge, though. The human body is equipped with all of the sensory devices necessary for determining if it is time to change the humidifier filter. Just follow these simple steps: - Before opening the humidifier to inspect the filter, be sure the unit is off and unplugged. - The first and best tool for this is a healthy nose. If the humidifier has a damp or mildew smell to it, the filter probably needs to be changed. With the filter being in constant contact with water, over time it is likely to develop bacteria and mold or mildew that will emit a noticeable odor. It is undesirable to have bacteria and mold spores emitted into the air that you are breathing, so when you begin to notice this smell, change the humidifier filter promptly. - The eyes are another handy device for determining if a humidifier filter needs to be changed. The bacteria and mold mentioned above could leave a noticeable residue. Also, if the filter is old it will begin to deteriorate. A filter that is rotted or torn should be discarded and replaced. Damaged filters will not operate nearly as efficiently as a new, intact filter. To change the filter on most models of humidifier, you need only lift the old filter out of its housing and insert a new filter. Be sure to clean the inside of the humidifier when changing the filter so as to remove any bacteria or mold that may be on the housing or in the base. A mixture of water and bleach would be a good idea for a thorough cleaning.
The 330xi has a timing change that doesn't need to be replaced.
It is likely bacterial growth and should be thoroughly cleaned and removed and the chamber sterilized before using again. If possible the water chamber should be replaced. Check with your insurance to determine how often this is covered.
It should be hooked to a cold line.
Changing your kitchen plumbing is not a safety issue. Your pumbing should be changed only if they need it.
Your belt should be checked for cracks or tears if you see these it should be replaced asap
Any loose components do need replaced.
I just replaced mine at about 95,000 miles.
It should last the life of the engine and is normally replaced when the engine is overhauled.