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Itho Daalderop single-pole maximum thermostat service set Mono/Duo/Mono Plus
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Itho Daalderop single-pole maximum thermostat service set Mono/Duo/Mono Plus 05-00089

€ 99.12 incl. VAT

Original spare part Itho Daalderop. Type: High-limit thermostat. Application: Hot water cylinder / Duo 80. Supplier code: 05-00089.

SKU: 8781817 Categories: , Brand:

Price and stock checked on 20 October 2026.

✓ In stock — delivery usually within 3–5 working days
EU delivery from € 17.95 · Shipping & payment

Price incl. VAT. Any delivery costs are calculated in the basket — see shipping & delivery.

Does this fit my appliance?
ApplicationHot water cylinder
Series / modelDuo 80 and 5 other models
Itho Daalderop number05-00089
Article number8781817
Not sure? Search by article or manufacturer number or check with the manufacturer or your installer.
All spare parts for Itho Daalderop Duo 80 →
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Itho Daalderop single-pole maximum thermostat service set Mono/Duo/Mono Plus: original Itho Daalderop spare part, type: High-limit thermostat. Application: Hot water cylinder (Duo 80). Manufacturer number: 05-00089; Instalpunt article number: 8781817.

According to the Itho Daalderop parts lists, this part fits 6 models, including Itho Daalderop Duo 80, Itho Daalderop Smart Boiler Mono Plus 30 03-00343 and Itho Daalderop Smart Boiler Mono Plus 50 03-00344. The full list is under “Fits”.

In stock: order before 14:00 and it ships the same working day; delivery within the EU usually takes 3–5 working days.

Check the rating plate of your appliance before ordering; if in doubt, ask the manufacturer or your installer.

Product information: Itho Daalderop single-pole maximum thermostat service set Mono/Duo/Mono Plus 05-00089

BrandItho Daalderop spare parts
Itho Daalderop manufacturer number05-00089
Instalpunt article number8781817
EAN8713418028284
Part typeHigh-limit thermostat (All Itho Daalderop thermostats and controls · thermostats and controls of all brands)
ApplicationHot water cylinder
Suitable for6 Itho Daalderop models (see list)
DeliveryIn stock, delivery in 3–5 working days
Price€ 99,12 incl. VAT
OriginSupplied through the official technical wholesale channel, under Itho Daalderop number 05-00089

Fits 6 Itho Daalderop models

The part Itho Daalderop single-pole maximum thermostat service set Mono/Duo/Mono Plus 05-00089 is in the official parts list of these Itho Daalderop appliances. Click a model for the complete parts list and exploded view.

Itho Daalderop Hot water cylinder (6)

Check the rating plate of your appliance. Not sure whether this part fits? Check with the manufacturer or your installer; with the correct manufacturer number you can order it here directly.

For which fault is a Itho Daalderop high-limit thermostat replaced?

According to the fault code database, these Itho Daalderop fault codes point to this type of part. Always check first that the code matches the appliance type on the rating plate.

CodeWhat is going on
0 geenHigh-limit thermostat open
8High-limit thermostat switches off and CH pressure is below 0.5 bar
9High-limit thermostat switches off and CH water temperature is above 80 oC

All Itho Daalderop fault codes explained

Indicative: the same code can have a different cause depending on the situation. Have work on gas, flue or burner adjustment carried out by a qualified installer.

Frequently asked questions about this item

Does the Itho Daalderop single-pole maximum thermostat service set Mono/Duo/Mono Plus 05-00089 fit my appliance?
This part is in the parts list of 6 Itho Daalderop models, namely the Duo 80, Smart Boiler Mono Plus 30 03-00343, Smart Boiler Mono Plus 50 03-00344, Smart Boiler Mono Plus 80 03-00345, Smart Boiler Mono Plus 120 03-00346, Smart Boiler Mono Plus 150 03-00347. The model type is on the rating plate of your appliance. If in doubt, ask the manufacturer or your installer.
What is the delivery time for the Itho Daalderop single-pole maximum thermostat service set Mono/Duo/Mono Plus 05-00089?
This item is in stock. Ordered before 14:00, it ships the same working day and usually arrives within three to five working days.
Can I return this item?
Yes, unused and in the original packaging within 14 days of receipt. Unpacked or fitted items and electronics such as PCBs cannot be returned. How to register a return is explained on returns.
What does shipping cost?
Shipping costs € 17.95 to Austria, Denmark, Italy, Spain and Sweden and € 24.95 to other EU countries. In-stock items ordered before 2 pm are dispatched the same working day; delivery usually takes 3–5 working days. Details: Shipping.
I have a fault code, which part do I need?
Look up the code in the fault code finder: per brand and appliance it shows what the code means and which part goes with it. If the code is listed with this part, the part belongs to that fault.

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