🌀Dryer

E:34

Bosch · WTW87NH2UC 4.0 cu ft 800 Series Smart Heat Pump

Bosch WTW87NH2UC 4.0 cu ft 800 Series Smart Heat Pump E:34 Error Fix: Heat Pump Condenser Sensor Fault

The condenser temperature sensor in the heat pump system has failed. The condenser sensor monitors the temperature at which heat is released from the refrigerant to heat the drying air. Check sensor wiring and measure resistance. Clean lint from the condenser coils — heat pump dryers require regular condenser cleaning. Replace the sensor if defective. A failed condenser sensor can cause inefficient drying or system shutdown.

Medium severity2 fixes available✨ Free fix available

Quick Answer

Error E:34 on the Bosch WTW87NH2UC 4.0 cu ft 800 Series Smart Heat Pump means: Heat Pump Condenser Sensor Fault. The top-ranked community fix is “Test and Replace the Condenser Temperature Sensor” (medium difficulty, ~45 min, DIY cost: $20-$30). 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:

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: $180-$250.

Other Bosch Models with Error E:34

WTW87NH1UC 4.0 cu ft 800 Series Heat Pump Dryer

dryer · 2 fixes

Other Bosch WTW87NH2UC 4.0 cu ft 800 Series Smart Heat Pump 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 WTW87NH2UC 4.0 cu ft 800 Series Smart Heat Pump Error E:34

What does error code E:34 mean on a Bosch WTW87NH2UC 4.0 cu ft 800 Series Smart Heat Pump?

Error code E:34 on the Bosch WTW87NH2UC 4.0 cu ft 800 Series Smart Heat Pump means: Heat Pump Condenser Sensor Fault. The condenser temperature sensor in the heat pump system has failed. The condenser sensor monitors the temperature at which heat is released from the refrigerant to heat the drying air. Check sensor wiring and measure resistance. Clean lint from the condenser coils — heat pump dryers require regular condenser cleaning. Replace the sensor if defective. A failed condenser sensor can cause inefficient drying or system shutdown.

How do I fix error code E:34 on my Bosch WTW87NH2UC 4.0 cu ft 800 Series Smart Heat Pump?

The most successful fix is "Test and Replace the Condenser Temperature Sensor" (medium difficulty, ~45 minutes). Estimated DIY cost: $20-$30. HomeMD has 2 community-ranked fixes for this error.

Is error code E:34 on a Bosch WTW87NH2UC 4.0 cu ft 800 Series Smart Heat Pump serious?

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Can I fix Bosch WTW87NH2UC 4.0 cu ft 800 Series Smart Heat Pump error E:34 myself?

Yes — the top-ranked community fix ("Test and Replace the Condenser Temperature Sensor") is rated medium difficulty and takes about 45 minutes. Tools needed: T20 Torx screwdriver, Multimeter.

How much does it cost to repair Bosch WTW87NH2UC 4.0 cu ft 800 Series Smart Heat Pump error E:34?

DIY cost: $20-$30. Professional repair typically costs $180-$250. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the Bosch WTW87NH2UC 4.0 cu ft 800 Series Smart Heat Pump have?

The Bosch WTW87NH2UC 4.0 cu ft 800 Series Smart Heat Pump 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:34 error?

Error code E:34 also appears on 1 other Bosch model: WTW87NH1UC 4.0 cu ft 800 Series Heat Pump Dryer. The fix may vary by model, so check each model's specific page for tailored repair steps.

What other error codes does the Bosch WTW87NH2UC 4.0 cu ft 800 Series Smart Heat Pump have?

The Bosch WTW87NH2UC 4.0 cu ft 800 Series Smart Heat Pump 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:34 error?

Error code E:34 also appears on 1 other Bosch model:

WTW87NH1UC 4.0 cu ft 800 Series Heat Pump Dryer (dryer) · 2 fixes

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