Vaillant fault code F.13

In brief

Fault code F.13 on a Vaillant boiler (including Hrpro and ThermoCompact) means: Short circuit of cylinder temperature sensor. Reset the appliance once. If the code comes back, a part is usually faulty, often a temperature sensor. You can check the water pressure and settings yourself; leave work on gas-carrying parts to a certified gas engineer.

After a safety alert (gas, flue gas, combustion), reset no more than once and call in a certified gas engineer. If you smell gas, call your national gas emergency number or 112 immediately.

Cause

Fault code F.13 on a Vaillant boiler indicates: Short circuit of cylinder temperature sensor.

Applies to

Vaillant Hrpro, ThermoCompact, ecoCOMPACT, ecoFIT pro, ecoTEC exclusive, ecoTEC plus, ecoTEC pure, hrEXCLUSIEF, CW 3/3, CW 4/3, CW 4/3 EXP, CW 4/4, CW 4/4 EXP, VC 1006/5-5 R3, VC 1206/5-5 R3, VC 254/4-7.

Matching parts

Vaillant parts are available from Instalpunt; shipping to EU countries from €17.95 (€24.95 for more distant countries), usually 3–5 working days.

Parts by Vaillant series: ecoTEC plus · ecoTEC pro.

For fault code F.13, the part involved is usually in the category: sensor.

Based on the cause, these original Vaillant parts fit (always check the type number of your appliance):

All Vaillant parts →

Other Vaillant codes with the same cause

F.00 — Open circuit of flow temperature sensor
F.01 — Open circuit of return temperature sensor (NTC)
F.02 — Open circuit of DHW outlet sensor
F.03 — Open circuit of cylinder temperature sensor/domestic hot water temperature sensor
F.05 — Open circuit in outdoor temperature sensor
F.06 — Open circuit of inside flue gas sensor

Fix it yourself or call an engineer?

Always consult the manual for your appliance and work safely. If in doubt or if the fault comes back, call in a qualified professional. A question about a part? Write to us at info@instalpunt.nl.

Frequently asked questions

What does Vaillant boiler fault code F.13 mean?

Short circuit of cylinder temperature sensor.

How do I fix fault code F.13 on a Vaillant boiler?

First check the cause described above. Then restart the appliance using the reset button. If the message comes back, a part usually needs replacing or the fault needs to be repaired by a qualified professional.

Which parts do I need for Vaillant fault code F.13?

That depends on the exact cause. In the Vaillant parts overview at Instalpunt you will find the current price and stock for each part.

Can I fix fault code F.13 myself?

You can reset the appliance and check things like the water pressure or settings yourself. Work on gas-carrying parts must be left to a certified gas engineer.

All Vaillant boiler faults and codes at a glance →

Other Vaillant fault codes

Fault code Err Fault code F.00 Fault code F.00 Fault code F.00 Fault code F.00 Fault code F.00 Fault code F.00 Fault code F.01