Electric Blind or Venetian Blind No Longer Goes Up

Is your electric blind or Venetian blind no longer working properly?

If your external blind or venetian blind no longer moves smoothly up or down, no longer stops at the set position, or only hums, the cause is almost always in the drive motor.
Many external blinds and venetian blinds contain a Dunkermotor, a so-called central motor.
The good news: In most cases, this motor can be repaired instead of replacing the entire system.

Do you have a Dunker motor installed?

Dunkermotoren are frequently used ex-works in external venetian blinds and external blinds from well-known manufacturers, including Warema and Hüppe (for example Hüppe Form and Hüppelux).
Depending on the year of manufacture, a different brand of motor may be installed. You can recognize a Dunker motor by:

• the model designation on the type plate: D240, D249, D259, D349 or D359
• the plugged-in Hirschmann connection cable (STAS 3)
• the design as a mid-mounted motor with two shaft outputs

Typical symptoms and their underlying causes

• The blind still goes down, but not up: This is usually due to a damaged component in the motor.
  We will replace it and repair your drive, with a 24-month warranty.
• The drive no longer stops at the set position or overshoots it: this is usually due to a defective limit switch. On a counter-clockwise rotating motor, the lower limit switch is often affected; on a clockwise rotating motor, the upper limit switch is usually the culprit.
• The motor hums, does not turn, or runs weakly: a defect in the motor electronics or a loss of power.
• The venetian blind rolls back down automatically after being raised: the motor brake is no longer engaged.

Repair instead of buying expensive new ones

You don't need to call an electrician or replace the entire system.
Thanks to the plug-in Hirschmann connection cable, you can disconnect the motor yourself and send it to us.

• Limit switch defective: Repair at a fixed price of €49.
• Other defect (electronics, brakes or loss of power):
  Complete motor replacement with a tested used motor for €69.
  Your submitted motor will be exchanged for a tested, fully functional one.

We offer a 24-month warranty on every repair and replacement motor. You will receive the invoice after successful repair, and insured return shipping will take place on the day payment is received. We carry out repairs on the day they are received.

Significantly cheaper than buying new or exchanging on-site.

A new blind motor often costs around €150 in stores, and an on-site replacement by a technician can quickly add up to several hundred euros. With our repair service starting at €49, you save the majority of that and keep your reliable system.

Send your model directly to repair

Select your model (it's on the motor's nameplate):

• Repairing a Dunkermotor D240 (€49)
• Dunkermotor D249 left-hand running (49 €)
• Dunkermotor D249 clockwise (49 €)
• Repair Dunkermotor D259 (€49)
• Repair Dunkermotor D349 (€49)
• Repair Dunkermotor D359 (€49)

Are you unsure which model you have? You can find an overview of all Dunkermotoren with explanations on our Dunkermotoren repair page.

Frequently asked questions about blind and venetian blind repair

Who repairs blind and venetian blind motors?

We do this. Many external blinds and venetian blinds, including those from Warema and Hüppe, use a Dunkermotor. We repair these exact drives by sending them in.

How much does it cost to repair a blind motor?

A defective limit switch costs a fixed price of €49. For other defects, we will replace the motor with a tested unit for €69. Both come with a 24-month warranty. You will receive the invoice after successful repair, and insured return shipping will be arranged after payment is received.

Do I need an electrician for the renovation?

No. Dunkermotoren are connected via a plug-in Hirschmann cable. You unplug the cable, remove the motor, and send it to us.

How do I know which motor is installed?

The model designation is found on the motor's nameplate, for example D240, D249, D259, D349, or D359. An overview with explanations can be found on our Dunkermotoren Repair page.