🌀Dryer

E:23

Bosch · WTW87NH1UC 4.0 cu ft 800 Series Heat Pump Dryer

Bosch WTW87NH1UC 4.0 cu ft 800 Series Heat Pump Dryer E:23 Error Fix: Control Module — Over-Temperature

The control module has detected an over-temperature condition in the dryer. The internal temperature has exceeded the safe operating limit. This may be caused by a restricted exhaust vent, a failed thermostat, or a shorted heating element that runs continuously. Check the high-limit thermostat — it should have continuity at room temperature. Check the cycling thermostat. Verify the heating element is not grounded to the housing.

High severity2 fixes available

Quick Answer

Error E:23 on the Bosch WTW87NH1UC 4.0 cu ft 800 Series Heat Pump Dryer means: Control Module — Over-Temperature. The top-ranked community fix is “Test and Replace the High-Limit Thermostat and Heating Element” (hard difficulty, ~90 min, DIY cost: $15-$40). 2 community-ranked fixes available below.

Published February 2026 · 2 fixes · dryer

Content is based on manufacturer service documentation, community repair experience, and OEM technical bulletins. Always verify with your owner's manual.Learn about our editorial standards.

When to Call a Professional

While many dryer repairs can be done safely at home, consider hiring a qualified technician if:

This is a high severity error — continued use may cause damage or a safety hazard
The repair involves electrical wiring, gas lines, or refrigerant
You've tried the top-ranked fix and the error persists
You smell gas, see sparking, or notice water leaking
The repair requires specialized tools you don't have
Your appliance is still under manufacturer warranty

Average professional repair cost for this issue: $150-$250.

Other Bosch Models with Error E:23

WTG86401UC 4.0 cu ft 300 Series Condensation Dryer

dryer · 2 fixes

WTG865H4UC 4.0 cu ft 800 Series Condensation Dryer

dryer · 2 fixes

WTW87NH2UC 4.0 cu ft 800 Series Smart Heat Pump

dryer · 2 fixes

Other Bosch WTW87NH1UC 4.0 cu ft 800 Series Heat Pump Dryer Error Codes

E:01

Restricted Exhaust Vent

2 fixes

E:03

Maximum Drying Time Exceeded

2 fixes

E:04

Heater Relay Stuck Open

2 fixes

E:07

Drum Motor Not Rotating

2 fixes

E:11

Restricted Exhaust — Secondary Alert

2 fixes

E:12

Restricted Exhaust — Tertiary Alert

2 fixes

E:13

Maximum Drying Time Exceeded — Repeated

2 fixes

E:17

Lint Screen Temperature Sensor Error

2 fixes

People Also Ask About Bosch WTW87NH1UC 4.0 cu ft 800 Series Heat Pump Dryer Error E:23

What does error code E:23 mean on a Bosch WTW87NH1UC 4.0 cu ft 800 Series Heat Pump Dryer?

Error code E:23 on the Bosch WTW87NH1UC 4.0 cu ft 800 Series Heat Pump Dryer means: Control Module — Over-Temperature. The control module has detected an over-temperature condition in the dryer. The internal temperature has exceeded the safe operating limit. This may be caused by a restricted exhaust vent, a failed thermostat, or a shorted heating element that runs continuously. Check the high-limit thermostat — it should have continuity at room temperature. Check the cycling thermostat. Verify the heating element is not grounded to the housing.

How do I fix error code E:23 on my Bosch WTW87NH1UC 4.0 cu ft 800 Series Heat Pump Dryer?

The most successful fix is "Test and Replace the High-Limit Thermostat and Heating Element" (hard difficulty, ~90 minutes). Estimated DIY cost: $15-$40. HomeMD has 2 community-ranked fixes for this error.

Is error code E:23 on a Bosch WTW87NH1UC 4.0 cu ft 800 Series Heat Pump Dryer serious?

This error is rated high severity. You should address it promptly — continued use could cause damage or safety concerns.

Can I fix Bosch WTW87NH1UC 4.0 cu ft 800 Series Heat Pump Dryer error E:23 myself?

Yes — the top-ranked community fix ("Test and Replace the High-Limit Thermostat and Heating Element") is rated hard difficulty and takes about 90 minutes. Tools needed: T20 Torx screwdriver, Multimeter, Needle-nose pliers.

How much does it cost to repair Bosch WTW87NH1UC 4.0 cu ft 800 Series Heat Pump Dryer error E:23?

DIY cost: $15-$40. Professional repair typically costs $150-$250. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the Bosch WTW87NH1UC 4.0 cu ft 800 Series Heat Pump Dryer have?

The Bosch WTW87NH1UC 4.0 cu ft 800 Series Heat Pump Dryer has 8 other known error codes, including: E:01 (Restricted Exhaust Vent), E:03 (Maximum Drying Time Exceeded), E:04 (Heater Relay Stuck Open), E:07 (Drum Motor Not Rotating), E:11 (Restricted Exhaust — Secondary Alert), and 3 more.

Which other Bosch models have the E:23 error?

Error code E:23 also appears on 3 other Bosch models: WTG86401UC 4.0 cu ft 300 Series Condensation Dryer, WTG865H4UC 4.0 cu ft 800 Series Condensation Dryer, WTW87NH2UC 4.0 cu ft 800 Series Smart Heat Pump. The fix may vary by model, so check each model's specific page for tailored repair steps.

What other error codes does the Bosch WTW87NH1UC 4.0 cu ft 800 Series Heat Pump Dryer have?

The Bosch WTW87NH1UC 4.0 cu ft 800 Series Heat Pump Dryer has 8 other known error codes:

E:01 — Restricted Exhaust Vent (2 fixes)
E:03 — Maximum Drying Time Exceeded (2 fixes)
E:04 — Heater Relay Stuck Open (2 fixes)
E:07 — Drum Motor Not Rotating (2 fixes)
E:11 — Restricted Exhaust — Secondary Alert (2 fixes)
E:12 — Restricted Exhaust — Tertiary Alert (2 fixes)
E:13 — Maximum Drying Time Exceeded — Repeated (2 fixes)
E:17 — Lint Screen Temperature Sensor Error (2 fixes)

Which other Bosch models have the E:23 error?

Error code E:23 also appears on 3 other Bosch models:

WTG86401UC 4.0 cu ft 300 Series Condensation Dryer (dryer) · 2 fixes
WTG865H4UC 4.0 cu ft 800 Series Condensation Dryer (dryer) · 2 fixes
WTW87NH2UC 4.0 cu ft 800 Series Smart Heat Pump (dryer) · 2 fixes

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