Thermador Refrigerator Error Code E07 — Compressor Overload / Not Starting
What this means
Error E07 on Thermador refrigerators indicates the compressor is not starting or has tripped its overload protector due to excessive current draw. The compressor is the heart of the refrigeration system — it circulates refrigerant through the evaporator and condenser coils. When it fails to start, the refrigerator and freezer will warm up. Causes include dirty condenser coils (causing the compressor to overheat), a failed compressor start relay, a failed compressor motor winding, a faulty inverter board (on variable-speed compressor models), or low refrigerant from a leak.
Alternate codes: Er 07, Err 07
Step-by-step fix
3 stepsClean the condenser coils
Dirty condenser coils are the #1 cause of compressor overheating and overload trips. Locate the condenser coils — on Thermador built-in refrigerators, they are usually at the top of the unit or behind the kick plate at the bottom. Use a condenser coil brush to loosen dust and debris, then vacuum it away with a crevice tool.
Thermador recommends cleaning condenser coils every 6 months. In homes with pets, clean every 3 months — pet hair clogs coils rapidly.
Test the compressor start relay and overload
Unplug the refrigerator. Access the compressor (usually at the rear bottom). The start relay is a small device plugged into the compressor's side. Pull it off and shake it gently — a rattling sound indicates a broken internal element. Test for continuity between the start and run terminals. A faulty relay should be replaced.
On newer Thermador models with inverter-driven compressors, there is no traditional start relay — the inverter board controls startup. Check the inverter board instead.
Test the compressor windings
With the start relay removed, test the compressor terminals (Common, Start, Run) with a multimeter. Measure resistance between each pair. Typical readings are 3–8 ohms (C to S), 3–8 ohms (C to R), and 6–16 ohms (S to R). Also test from each terminal to the compressor body for ground — there should be no continuity (OL). Continuity to ground means the compressor is shorted internally.
A compressor that tests good on resistance but still won't start may be mechanically seized — you'll hear a click-buzz-click pattern as the overload trips repeatedly.
When to call a professional
Compressor replacement requires handling refrigerant (which by law requires an EPA Section 608 certification), brazing sealed-system lines, and recharging the system. This is strictly a professional job. If the compressor is confirmed bad, call a Thermador authorized service company.
Related error codes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
Learn more about our sourcesParts you may need
Inverter Board (variable-speed models)
Part #00647583 · $100–$200
If inverter board is not providing proper voltage to compressor
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