Not cooling · Is the refrigerant going?
Someone Said It Needs a Compressor. Does It?
- Signed
- Dean Halvorsen
- Role
- Refrigeration technician — sealed systems and airflow
- Certification
- EPA Section 608 certified
- Published
Short answer
Sometimes, but ask to see the proof. A stuck start component, a stalled condenser fan, a coil packed with ice or a control that has stopped sending power can each leave a Sub-Zero warm with a healthy compressor. Sub-Zero Repair Edmonds tests those first, for the $89 service call: (206) 210-3547.
What proves a compressor has failed
Sub-Zero’s service manuals work through the unit in a fixed order: the door, the fans, the defrost, the controls and the power reaching the compressor first, and pressures only when none of those explains the warmth. For the compressor itself, proof means readings:
- the control is actually sending it power;
- the start parts pass their tests;
- the windings (the motor’s copper coils) measure correctly with a meter, including a check to ground;
- once it runs, pressures that match a weak pump rather than a leak or a blockage.
Refrigeration technicians are warned in their own trade literature that compressors are often condemned when another part is to blame.
What can pass for a dead compressor
- The start relay or overload protector (small parts on the compressor that get it turning and cut it out if it overheats). A hum, a click, then silence can be the overload tripping for some other reason.
- A condenser fan that has stopped, so the compressor overheats and trips out.
- A coil packed with ice after a defrost fault: the compressor runs, the air stays warm.
- Low voltage at start-up, which lengthens the start and can trip the overload. Sub-Zero’s design guide calls for a separate circuit serving only the built-in.
- A refrigerant leak, where the compressor is sound but has too little to pump.
Questions to ask whoever quoted it
What was measured, and what did it read? Were the start parts and the circuit tested? Does the price cover a new filter-drier (the small filter that keeps moisture out of the system), clearing the system and the recharge as well as the compressor? A careful diagnosis has an answer for each.
What it may cost
$89 to find out — the visit and the diagnosis, taken off the repair if you go ahead.
- Compressor or sealed-system repair Shows as a compressor that clicks and will not start, or refrigerant slowly lost $1,300–$3,270
- Evaporator or condenser fan motor Shows as a fan that has gone quiet behind the grille, or cold coils behind a warm shelf $340–$700
Start parts, wiring and supply faults have no band on this site; they are quoted after the diagnosis.
Ranges, not starting prices. The technician names one figure inside the band before any panel comes off, and Sub-Zero Repair Edmonds holds to it.
Wait or call today?
Can wait until morning
- You have a quote in hand and the fridge still holds 40°F or colder: there is time for a second look before you agree.
- One section of a two-compressor built-in has gone warm while the other is fine: move the food across and book.
Call today if
- The compressor clicks on and off every few minutes and never gets going.
- The fridge is above 40°F and the freezer has started to thaw.
- There is a burning smell at the grille: switch off at the breaker, then phone.
Anything in the second card is a reason to phone Sub-Zero Repair Edmonds on (206) 210-3547 today rather than tomorrow.
Questions people ask next
What should a compressor diagnosis include?
Readings, not impressions. Power checked at the compressor, the start parts tested, the windings measured with a meter, and the fans, defrost and controls ruled out before any gauges go on. Sub-Zero's service manuals put pressures last for exactly that reason. Ask Sub-Zero Repair Edmonds what each reading means: (206) 210-3547.
If it really is the compressor, is the unit finished?
Not necessarily. Changing it is sealed-system work: refrigerant captured, the compressor and filter-drier replaced, the system cleared of air and moisture, then recharged. On a built-in whose cabinet, doors and gaskets are sound, that is often worth doing. The price bands printed on this page show where such a job sits before you weigh it against a new unit.