ERROR CODE · SUB-ZERO REFRIGERATOR · ORANGE COUNTY
Sub-Zero Refrigerator Error Code EC24
Defrost heater not heating — defrost cycle is failing completely.
What EC24 means.
EC24 is the more severe sibling of EC20. The controller energized the defrost heater on schedule, but the coil temperature did not rise at all — meaning the heater is open-circuit, the safety thermostat is open, or the wiring to the heater is broken. Once EC24 logs, frost will build on the evaporator until airflow stops; you typically see the freezer struggle first, then the fresh-food side warm up over 48–96 hours. This is one of the codes that produces the classic "fridge stopped cooling overnight" callout.
Most common causes.
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Defrost heater element open-circuit (most common — heater coils fail with age).
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Defrost safety thermostat (bimetal) failed open.
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Wire harness to the heater chewed or broken near the evaporator pan.
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Control board defrost relay failed.
Try this first — safe DIY troubleshooting.
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Manual defrost: unplug for 24 hours with both doors open and towels at the base.
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After defrost, restore power and listen — if the compressor runs and you hear the evaporator fan, EC24 may have temporarily cleared.
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It will return. Plan for service before food starts spoiling again.
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Do not bypass the safety thermostat — it is a fire-prevention device.
What does this repair cost?
Typical part cost
$80–$220
Full repair (parts + labor)
$320–$550
Time on site
90–120 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.
Three steps. No surprises.
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Book in 2 minutes.
Pick your symptom and a time window. We confirm by text.
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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.
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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).
What your neighbors said this month.
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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!
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!
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.
Yelp · Verified
Don't wait — Sub-Zero EC24 usually gets worse.
We diagnose in 60 minutes, quote in writing, and most repairs finish on the first visit. OEM parts on the truck.