Thermador T18IF800SP
Think of the T18IF800SP as the 800-generation forerunner of the current T18IF905SP. Both are 18 inches wide with the flush Freedom hinge and an ice maker inside the cabinet, and this one holds 8.6 cubic feet. Its use and care guide stands out among Thermador’s refrigeration literature because it describes a self-test and asks owners to run it before booking service.
Should the test find a problem, the ALARM symbol appears together with a message that names the part, a sensor for example. Write that message down. The guide also sets a window of 25-120 psi of water pressure for the ice maker, which accounts for many small-cube complaints where the supply is weak or a reverse-osmosis unit sits on the line.
Frost on the rear wall suggests defrost trouble, and a door left slightly open sounds the door alarm.
Power it down for 5 minutes, power it up with the door shut, and then press and hold SETUP with ALARM OFF for 5 seconds.
The guide Thermador wrote for the IF columns says 25 to 120 psi. Pressure outside that window tends to give small cubes. Weak supply or a reverse-osmosis unit can fall outside it.
The freezer warmed while the power was off. The alarm should clear once it recovers; one that repeats under steady power needs a service check.
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