Bosch Refrigerator C1 Means the Compressor Runs but the Cabinet Will Not Cool

What C1 means

Bosch keeps C1 for a cooling system that is not doing its job. The repair manual sets exact terms: the compressor has been running for over three hours and a defrost sensor still reads above 23 degrees Fahrenheit. So the compressor is busy, yet the evaporator never gets cold. The manual points to refrigerant leakage as the place to check.

Common causes of C1

Refrigerant escaping from the sealed system
Compressor that runs without pumping effectively
Blockage inside the sealed system that stops refrigerant flow

✓ One safe check you can try

No home fix exists for C1, but one observation helps us. Put your hand near the compressor at the back: does it run warm and vibrate while the freezer stays soft? Keep every cover on and the doors shut to hold the cold in. Then call, because the sealed system needs a technician.

! Why to stop there

The sealed system holds pressurized refrigerant, and opening it is regulated work for trained people only.
A leak, a weak compressor and a blockage give the same outward picture, so guessing can mean paying for the wrong repair.
Running the refrigerator for days in this state strains the compressor and puts the food at risk.
Sealed-system work is a real expense, so a written price to compare with a new unit is worth having.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

→Same appliance

Other Refrigerator codes

F3Bosch Refrigerator F3 Shows a Freezer Defrost That Timed Out r3Bosch Refrigerator r3 Shows a Fresh Food Defrost That Timed Out ESBosch Refrigerator ES Means a Dispenser Button Reads as Pressed dFBosch Refrigerator dF Means the Freezer Drawer Reads as Open E21Bosch Refrigerator E21 Means the Dispenser Module Stopped Responding F1Bosch Refrigerator F1 Shows the Freezer Sensor Reads Open or Shorted r1Bosch Refrigerator r1 Marks a Fresh Food Probe With No Usable Signal u1Bosch Refrigerator u1 Points to the V-Sensor

C1C1 questions

Does C1 mean the refrigerator is finished?

Not necessarily, but it is the most serious code in this group. Whether repair makes sense depends on what we find, and we give you the price first.

How long can my food wait?

Not for long. If the compartments are warming, move perishables to coolers with ice and keep the doors shut until we arrive. Checking early limits how much stress the compressor takes.

Can I reset C1 myself?

A reset may clear the message, but if the cooling problem is real the code returns. The compressor and the sealed system have to be tested.