I am looking at buying a used kenmore 15100 btu unit model 253-355-350 that is supposedly 5-6 years old but little to no use. Is there any issues with this regarding losing some of the coolant? Does it hurt the unit sitting for 6 years and is its life expectancy shortened substantially? Is it efficient in regards to energy used or should I be buying a new one because technology has changed.

Found very little on that model: Kenmore 25373156301
24 in. Wide, 18 in. Height, 24 in. Depth and approx. 112 lbs.
15,000 BTU, Parts are still available.
Unknown date(s) of manufacture but Sears (Kenmore) does have similar (exact matches) models still in production.

Have you checked the current supply going to the A/C? A simple voltmeter will work or you can try a KILL-A-WATT available online or from many local retailers. You should be looking for approximately 120VAC @60 Hz. 5 years does not seem very long but given the way manufacturer's are making A/Cs these days I suppose the fan motor or motor bearings could be going bad. I don't know the cost of your model but if it is not over 10,000 btu's or so just let it run until it dies and replace it. At some point the motor will most likely overheat and blow a fuse or trip your circuit breaker. I own 2 Frigidaire window units myself.

Don't really get a clear idea of what you are asking, I assume you mean a window mounted unit.

The answer is... it depends. Not only does the cost of a used window mount air conditioner vary with condition, but also with the BTU rating and its energy efficiency.

A 12500 BTU window mounted air conditioner, in good working order (enough to cool up to a 400 square foot room on a sunny day with average insulation would probably be a fair buy in the neighborhood of 75-140 dollars if it was a fairly recent model. If it is over 5 years old, I wouldn't buy a used one. These things are made cheaply for the most part, they are installed over and over again year after year, if you take care of them they can last a good while, however most people don't get a great deal of time out of them without some sort of issue arising.

Is this a 120 volt unit? If so, you might try to find the amp rating on the unit itself. A 120 volt unit that big will have to have a circuit all by itself. Probably a 20 amp breaker, no less than 15 amp just for the air conditioner.

If it is 240 volt, it will definitely have to have its own circuit.

Hello
This model is 5050 btu per hour,will cool room 10x15 or 150 sq feet.

I have a Kenmore Model 110.74612200 it came with the house and needs another service call-not heating- how old is this model? Wondering if it might be time to buy a new one. Dryer has seen a lot of use in the past 5 years from a household of six.

I'll give it to you straight
Get the Kenmore. i work on all of them and i work on less kenmore

Your model number is not complete enough for a model check.
However, 18,000 btu in todays' units is what you need.

Is the compressor running at all? During the move was the unit kept upright? The compressor cant compress a liquid so if the unit was set on one of its sides or upside down for very long the oil drained into the compression chamber and it will take an equal amount of time for it to drain back out do not try to run it until it has set upright for a day at best it will trip the overload at worst it will break a valve. Hope this was some help GL!

Best just to replace it.