how long do they last or until u should change them
636865
I replaced the original capacitors in my two air conditioner condenser units after 4 years. Both caps dried-up and shorted. My guess of the root cause is the excessive heat environment that they are exposed to causing premature internal leakage current. I would anticipate the same if you have a similar high temperature environment. The two killers of capacitors are inrush current and temperature but you have little control over the inrush current. In a cool environment, those same capacitors should last 10+ years (I am an electrical engineer).
636866
This was a replacement for a burned out one on my AC unit. The factory installed one lasted ten years.
636867
With a new A/C condenser unit, a capacitor is probably good for 5 to 7 years; maybe longer. You should definitely get a spare, just in case, after three years, because if you have no spare, it can be a very uncomfortable several days (or longer) until your unit cools again.The original capacitor on my condenser went bad during the seventh year, but each unit will, of course, be different (climate, hours of operation, etc.). I live in a VERY hot area, with long summers.With an older condenser, you should probably keep a spare at all times. Same with the controller, although they tend to last much longer than the capacitors. With a new A/C condenser unit, a capacitor is probably good for 5 to 7 years; maybe longer. You should definitely get a spare, just in case, after three years, because if you have no spare, it can be a very uncomfortable several days (or longer) until your unit cools again.The original capacitor on my condenser went bad during the seventh year, but each unit will, of course, be different (climate, hours of operation, etc.). I live in a VERY hot area, with long summers.With an older condenser, you should probably keep a spare at all times. Same with the controller, although they... » Read More With a new A/C condenser unit, a capacitor is probably good for 5 to 7 years; maybe longer. You should definitely get a spare, just in case, after three years, because if you have no spare, it can be a very uncomfortable several days (or longer) until your unit cools again.The original capacitor on my condenser went bad during the seventh year, but each unit will, of course, be different (climate, hours of operation, etc.). I live in a VERY hot area, with long summers.With an older condenser, you should probably keep a spare at all times. Same with the controller, although they tend to last much longer than the capacitors. « Show Less
1853087
They usually can last a year.....but I personally notice a difference after 6 months.
1101815
No they won't last very long maybe 5 years if you are lucky. I would say 2 years out since they are not made for it.
41859
They're ones I have. I haven't had to replacey yet, but will soon. They may need to be cut to size
703888
I've only had mine for a month or so. However, I'm certain it depends on how often you use them and how well you take care of them after and between each use. I expect mine will last longer than 6 mo. as I don't wear them constantly.
1324193
It really depends on your usage. I change them every 12 months, or less if I notice a quality change. The manufactures website has a fact sheet that says how many gallons they are rated for.
1664619
Hi John, if you keep them plugged in continually (which is what I would recommend for full effectiveness) then each bottle lasts about a month. I actually have a reminder in my calendar to change them out. I forgot once at the end of a month and paid the price a week later. :)
305369
Depends on what kind of batteries you are using. I have two on my light. They seem to last about 2.5 to 3 hours before I need to change them out.
1488160
Not sure how long they last. But I have had mine a few months with no issues
1183937
I buy them in advance. They are sealed in a bag, so they will last a long time. If you use them only at certain times, store in a baggie.I just change mine every 30 day after constant wearing.
291369
I had mine for 2 years. They come back year after year. A friend of mine has had them for years.
746135
It depends on your flow. On heavy days, I change ever couple hours but in light days I can go all day. I usually rinse it every 6 hours whether it needs it or not though because it feels more sanitary and helps keep odor to a minimum. But I can wear them overnight and not have any issues.
2022070
Not sure what others have done, but I kept mine on my hand continuously for over a month, changing them or cleaning as necessary. I would assume that the more they are worn, the better the results.
1248333
That is a good question. We have been using ours for 5 years and haven't changed them so far.
47752
Save them to when you need them. After a while they tend to get a bit scratched so you can change them.
1298653
Hold long they last really depends on your usage of them as this varies from person to person. We will be offering replacement heads for sale next month.
1965241
I had that happen when i first started. They probably will even out. How long have you took them??