Clean under freezer with vacuum, if frost free look under front louver panel(2 screws or snap in fit) for defrost-timer - use sraight tip screw driver to turn slot slowly till you hear click. wait to see if starts working properly, if not that mostlikely problem
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compressor overheating when this happens? Feel the top of the compressor when
this is happening and tell me if the top of the compressor becomes extremely
hot to the point that you cannot keep your hand on the compressor. Reason I ask
you to do this is that it is possible that the compressor is short cycling because
of a defective start relay and/or run capacitor. Let me know if the compressor is overheating of simply turning itself off. I will post a service manual if interested but would like to e-mail you the service manual for your Hoshizaki KM-255BAH because of copyright issues. You may contact me HERE if you like. Thanks Sea Breeze
Actually, its not kicking on for a few seconds and switching off, its trying to start every few minutes. This could be caused because the compressor is bad, or the start kit which starts the compressor is bad. Since you will not have the equipment to jump start the compressor to see if the compressor is bad or the starter is bad, you will either have to have it inspected by a refrigerator repairman or buy the start kit, i.e. overload and start relay, for your model refrigerator and hope thats the problem. But if it turns out the compressor itself is bad, you will not be able to return this start kit once you install it, since any parts supplier will not accept returns on electrical parts.
the motor is a compressor. it only runs when the thermistate is closed through the compressors relay unit there is no problem with the motor (compressor) the fault will be in either the thermostat or in the relay call a fridge repair tech and have then look at these parts the repair should not cost more than $ 150.00
It's probably the defrost timer is getting stuck in the defrost mode. What it does it it periodically interrupts power to the compressor and sends power to the defrost coils to allow any frost on the cooling coils to melt to keep them clear of ice build up. This is typically a mechanical timer and sometimes the motor fails and it stop turning and if it fails in the defrost mode, the compressor never turns back on no matter how warm the freezer is.
You can confirm it is the timer, by tracing the wires from the compressor to a little 2 by 2 inch box which is the timer. On one side there should be a round hole with a plastic cam. You should be able to turn that cam with a flat screw driver or a coin. Just give it a slight turn until you hear a click. After you turned the cam, the compressor should start. If it does, then it is the timer.
no check the air thats being blown by the fan in the freezer can you feel any cold air and i mean cold?
if not go to the back of the fridge
taKE Off the bottom panel should have like 6 to 10 screws
see if the fan in the back is working
see how hot the compressor(the big black thing next to the fan, sorry some people dont know what it is) see if its hot if it is very very hot like burn your hand hot you can try to cool it down with some paper towels and cold water but unplugg the fridge
if its warm not so hot or cold
than you need to get a 3 in 1 kit
your compressor is not turning on because the starter relay is not good and its not helping the fridge turn on
the relay is very very easy to install
once you get it youll have to take off the black plasticon the right or front side of the compressor there are two plastic parts that are on the compressor under the big black part ( you might not have the black plastic if not just do this step) take the plastic parts that have the wires attached to it
put the kit on on the kit there are three wires with metal little parts at the tips fallow the directions and place them on the right part of the compressor
there are three metal sticks about less than an inc big and you have to put the three wires on each one FALLOW THE PICTURE black on the middle on and depending if you middle on is on the top or bottom would depend where you put what color wire
if you middle one is at the top put white wire on the left and red on the right and if you middle one is in the bottom black goes on it and white on the right and red on the left but like i said fallow the directions
than you have to strip the other two wires that are left on the kit
than take the two wires that you took off with the plastic parts that were on the compressor
once you cut them strip the wires and just connect them to the two left over ones from the kit
doesnt matter which one goes where
sorry for the long reply
but this should help
if you do the 3 in 1 kit and the compressor turns on and after a while like an hour it doesnt feel cool air at all than you have a freeon leak which mean new fridge
the 3 in 1 costs like 20 dollars
good luck keep me upadated
look around the back of the freeze and at the bottom you will see a small black compressor .Put your hand on it and if it is running you will feel it vibrating. If it vibrating but running very hot them it means you have no gas in the system so the freezer won't freeze. If the compressor is cold and not running then it could be eaither the relay on the compressor or the board on the front either way you will need to get an engineer in
Sounds like the low pressure cutout switch is stopping your compressor running, especially if the "5 seconds" you mention are exactly the same length each time. Not enough refrigerant would be the usual cause, but the reason for the refrigerant loss is harder to tie down - possibly a seal or a loose valve seat or even a pinhole in a copper tube. Best solution now would be to get a refrigerator mechanic to top it up and check for leaks - get a quote first to check - 'fridge gas is getting costly.
Other possible solution is that the low pressure switch itself is faulty, relatively inexpensive to replace (but unfortunately you will need at least a partial gas recharge on most types of system after) - your fridge gas guy will be able to check very easily if there is adequate gas in the system, and should check this low pressure switch if there is not.
Usually this is fixable many times, just check the cost first.
Hope this helps :)