What it means
On two-digit displays it shows as E1 then 01 in turn, and some models show C101. Samsung's service manual and Smart Install guide list E102 / C102 with the same meaning. On Samsung EHS heat pumps, the control kit manual lists E101 as a 'CONTROL KIT / OUTDOOR UNIT wire connection error', which is the same link between the indoor side and the outdoor unit.
What to check, in order
- Reset the power once
Samsung's service pages say this error can be temporary. Switch the air conditioner off at its breaker (or unplug it), wait about a minute, then switch it back on.
- Check the outdoor unit has power
On multi-split systems Samsung says to check that the outdoor unit's power cord is connected and its breaker has not tripped.
- Write the code down
Note the code and whether it appeared after a power cut, so you can pass it on to the engineer.
When to call an engineer
If the code comes back after a reset, book an engineer. Samsung says the communication wiring or a circuit board may be faulty, and its Smart Install guide has the installer check the cable connections between the units and that the power and communication cables are not swapped.
Quick answers
What does the Samsung E101 error code mean?
The indoor unit has lost contact with the outdoor unit. Samsung says this can happen when communication between them is unstable or when power to either unit is cut. On two-digit displays it shows as E1 then 01 in turn, and some models show C101. Samsung's service manual and Smart Install guide list E102 / C102 with the same meaning. On Samsung EHS heat pumps, the control kit manual lists E101 as a 'CONTROL KIT / OUTDOOR UNIT wire connection error', which is the same link between the indoor side and the outdoor unit.
Can I fix Samsung E101 myself?
Easy (about 5 minutes to try). Start with: reset the power once; check the outdoor unit has power; write the code down. If the code comes back after a reset, book an engineer. Samsung says the communication wiring or a circuit board may be faulty, and its Smart Install guide has the installer check the cable connections between the units and that the power and communication cables are not swapped.
Is Samsung E101 worth repairing?
Worth fixing. A power reset sometimes clears it. If not, it is a wiring or board fault that is worth fixing.
Checked against
- Samsung Electronics Service (Korea): E101, C101, E201, C201 codes on an air conditioner (Korean)
- Samsung Electronics Service (Korea): wall-mounted AC shows E101, C101 (Korean)
- Samsung Electronics Service (Korea): air conditioner inspection codes 100 to 199 (Korean)
- Samsung India support: Samsung AC Smart Install guide (error codes for installers)
- Samsung AR10RYFT / AR13RYFT wall-mounted air conditioner service manual (PDF), 'Display Error and Check Method' (copy on notice-facile.com)
- Samsung MIM-E03CN EHS control kit installation manual (PDF), error codes part 1 (ManualsLib copy)
Last reviewed October 2026. Manufacturers update their pages, and your manual is the final word. Spotted a mistake? Email contact@appliance-error-codes.com.