Freezer drawer was screaming every few minutes. Turned out to be the condenser fan blade catching on lint packed into the grille. He cleaned it out, balanced the blade, and told me how often to vacuum it. Charged the visit fee and nothing else.
Symptom · noise
Sub-Zero making noise
Every noise a built-in makes points somewhere. A screech is a bearing, a rattle is usually ice on a fan blade, a click with no cooling is a relay. Describing it accurately is half the diagnosis.
Call dispatch, any hour (669) 338-4601 Someone picks up at any hour. Same-day slots open and close through the day, so the dispatcher will tell you what is actually free when you call.
Board exposed at the harness · electrical faults get measured, not guessed
01 Noise to part
What the sound is telling you
Find the row that matches what you are hearing. Note when it happens as well as what it sounds like — the timing separates two faults that sound almost identical.
| What you hear | Usual cause | What we do on site |
|---|---|---|
| Screech or squeal, worst at the end of a long run | Evaporator fan motor bearing on its way out | Rear panel off, motor spun by hand and listened to under power, motor replaced as an assembly. |
| Rattle or ticking from inside the compartment | Fan blade clipping frost, which means the defrost circuit has stopped clearing the coil | Ice cleared, then the defrost heater, thermostat and board output tested so it does not return. |
| Buzz that comes and goes at the back | Condenser fan blade out of balance, or the drain pan resonating against the compressor mount | Blade cleaned and balanced, pan and mounts isolated in turn until the resonance stops. |
| Click every few minutes, no cooling | Start relay or overload cutting the compressor out on attempted start | Relay and overload tested off the unit, compressor windings read, amp draw taken on start attempt. |
| Loud hum, noticeably louder than it used to be | Compressor mount rubber perished, so vibration is going straight into the cabinet | Mounts inspected and replaced. Cabinet levelled so the unit is not carrying load on one corner. |
| Gurgle or trickle after the unit cuts out | Normal refrigerant settling in the lines | Confirmed as normal. No repair, and we will say so rather than sell you one. |
Record it If the noise is intermittent, catch it on your phone. A five-second recording tells a technician more than a paragraph of description and often decides which part rides out on the van.
02 Why noise matters
Noise is usually the cheap stage of an expensive fault
A fan blade rattling against frost is not really a noise problem. It is a defrost problem that has been running long enough for the ice to reach the blade. Fixed now, it is a heater or a thermostat. Left alone, the coil blocks completely and you are calling about a warm cabinet instead.
The same is true of a fan bearing. A motor that squeals under load still moves air. A motor that has seized moves none, and the compartment starts drifting warm within a day. Replacing the motor while it is still turning is the cheaper visit.
The exception is the gurgle you sometimes hear after the unit cuts out. That is refrigerant equalising in the lines and it is normal. If that is all we find, we will tell you so and the visit ends there. If it is also running warm, the noise is a symptom rather than the problem.
03 Reviews
Noise calls, in their words
A rattle that only happened at night. He recorded it, matched it to the evaporator fan bearing, and swapped the motor. Explained why it only showed up on the long overnight run.
Buzzing that came and went. Rather than guessing he left the unit running and came back to it, then found the drain pan resonating against the compressor mount. Small fix, properly diagnosed.
04 Questions
Noise questions
It only makes the noise at night. Is that in my head?
No, and it is a useful clue. Overnight the unit runs its longest uninterrupted cycles and the kitchen is quiet. A bearing that is only audible at the end of a long run is almost always an evaporator or condenser fan motor.
A click every few minutes and then nothing. What is that?
That is usually the start relay or the overload cutting the compressor out because it cannot start. It is a real fault and worth calling about promptly, because a compressor repeatedly trying to start is not doing itself any good.
Is a rattle worth a service call?
If it is loud enough to notice, yes. Most rattles are cheap — a fan blade clipping ice, a drain pan resonating, a loose grille. The reason to have it looked at is that a fan blade hitting ice is telling you the defrost circuit has stopped working.
Can you find a noise that comes and goes?
Usually. If it will not perform on demand we leave the unit running, work on the parts we can measure, and come back to it. Recording it on a phone genuinely helps, so do that if you can catch it.
Tell the dispatcher the model number and what it is doing
It is stamped on a plate inside the fresh-food compartment, usually on the upper left wall or behind the top grille. With the model in hand the van gets loaded with the parts that unit actually fails on, which is the difference between one visit and two.