ERROR CODE · THERMADOR REFRIGERATOR · ORANGE COUNTY

Thermador Refrigerator Error Code E20

Power and display modules not communicating — ribbon cable or board issue.

(949) 969-8600
$65 diagnostic — waived with repair
60–90 min
Same & next-day Mon–Sun

What E20 means.

E20 means the display module and the power module have lost the ability to talk to each other. They communicate over a ribbon cable, and if that cable is pinched, unseated, or one of the boards has failed, the system logs E20. The unit may still appear to work for a moment after startup but will refuse to respond to commands, and most of the temperature regulation features go offline. Frequent on Freedom columns after a board service if the ribbon was not re-seated properly.

Most common causes.

  • Ribbon cable loose between display and power module.

  • Ribbon cable damaged (pinched, cut, or aged).

  • Power module communication chip failed.

  • Display module failed.

Try this first — safe DIY troubleshooting.

  1. Power down at the breaker for 10 minutes.

  2. Restore power and watch — sometimes a brief disconnect re-seats the ribbon contacts enough to clear.

  3. If E20 returns, the boards need professional service — getting to the ribbon requires removing the front trim panel.

What does this repair cost?

Typical part cost

$30 (ribbon) to $500 (board)

Full repair (parts + labor)

$280–$680

Time on site

60–90 min

Prices reflect 2026 OEM part costs for the Orange County market. Diagnostic is $65, waived when you authorize the repair. 3-month warranty on parts and labor; 6–12 months on compressor and sealed-system work.

Other Thermador error codes we fix.

Related fridge symptoms.

Three steps. No surprises.

  1. Book in 2 minutes.

    Pick your symptom and a time window. We confirm by text.

  2. Diagnose in 60 minutes.

    We arrive in a marked van, diagnose the issue, and quote the repair before we touch a screw. $65 diagnostic fee — waived if you say yes to the repair.

  3. Fix it today, when we can.

    Most repairs finish in the same visit because parts ride on the truck. Every job carries a 3-month warranty (6–12 months on compressor work).

See our full process →

What your neighbors said this month.

  • I couldn't recommend this company more highly. I have used them several times and found Ivan to be knowledgeable, responsive, honest and courteous. He has saved me from buying a new refrigerator twice and unlike so many vendors, he is always able to diagnose the problem quickly and always knows how to fix it. If you want someone reliable who truly knows his craft and is always fair and reasonable, call We Fix Fridges!

    — Vicki M.

    Yelp · Verified

  • We have used this company several times now. I wanted to leave a review because Ivan really went above and beyond for this last repair the day before a big holiday weekend. He saved us! 100% recommend him. Besides being so knowledgeable which helps with diagnosis to repairs he is courteous and timely and we have found his prices to be very fair. It's hard to find a trustworthy reliable repair person. We have Ivan on text now!

    — Judy G.

    Yelp · Verified

  • Highly recommended. Been in business with Ivan 3 different times with different appliances and all were satisfactory with problem fixed. He even figured out an indirect minor issue and fixed it for us with no charge without us asking for it. Ivan will be the first one I call in any cases of an appliance that needs repair.

    — Bao P.

    Yelp · Verified
Read every review on Yelp →

Don't wait — Thermador E20 usually gets worse.

We diagnose in 60 minutes, quote in writing, and most repairs finish on the first visit. OEM parts on the truck.

Or call (949) 969-8600