Making humming noise on and off and not cooling

Does that unit have a low temperature monitor built in? Maybe that is what is making the noise when your temps dip to -10 degrees. Actually, that is great because the lower the temps the longer you can keep food in the freezer so I would not be overly concerned about that aspect. BTW, have you tried to isolate the source of the humming noise?

The humming noise might be your cooling fan(s) coming on with the key in the "on" position. Check your battery connections for corrosion. Have someone jump the battery to see if the additional amps will turn the starter. Sounds like a bad starter though. I would need to know the year, make, model to be more helpful.

Sounds like your electric cooling fans are working properly...any change in coolant temp in these situations?

If it is a new humming noise then it is probably one of your cooling fans. Try opening the case and blowing out the fans.

The humming noise is most likely from vibration, check to make sure the freezer is level.

If it is level look in the back lower area there is a compressor, black component about the size of a bowling ball, make sure nothing has fallen on it or touching it causing the noise.

yes need to replace

if the noise continues after you power down its the cooling fan

the humming noise is most likely your motor. does it overheat or shut down on you? do you smell anykind of burning? Joe

color wheel can make a squealing noise when the bearings go out, or a defective light engine can make a grinding noise.

Some of the larger TV's are DISH ready, meaning that they have the tuner inside for SAT TV. The SAT tuners often have an internal fan that makes a humming noise. If it sounds like something other than that, you might have a bad component in your sound circuit that allows 60 HZ hum through the speakers.


If it is a rear projection LCG TV it has a fan in it to cool the bulb. You will hear the fan if you listen closely. It usually cannot be heard over the volume.


The fluorescent bulb and electronics inside make humming sound naturally. Kinda like when you turn on a lamp, and some lamps make a low humming sound.