Bosch fault code 1037 W
Fault code 1037 W on a Bosch boiler (including Condens 7000WP) means: Outdoor temperature sensor defective, substitute mode heating active. 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 1037 W on a Bosch boiler indicates: Outdoor temperature sensor defective, substitute mode heating active.
Fixing fault code 1037 W: step by step
- Reset the appliance once; a one-off measuring error will then clear.
- Where you can reach it without opening the sealed combustion section, check that the sensor plug is seated firmly and the wiring is undamaged.
- If the code comes back, the sensor or its wiring is usually faulty (short or open circuit). Sensors in the sealed combustion section should be replaced by a qualified heating engineer.
Applies to
Bosch Condens 7000WP, WP 100 23, WP 125 23, WP 150 23, WP 50 23, WP 70 23.
Matching parts
Bosch parts are available from Instalpunt; shipping to EU countries from €12.95 (€16.95 for more distant countries), usually 3–5 working days.
For fault code 1037 W, the part involved is usually in the category: sensor.
Based on the cause, these original Bosch parts fit (always check the type number of your appliance):
Bosch sensor € 69.63
Bosch hot water sensor € 121.63
Bosch pressure sensor 6 bar € 40.51
Further reading on this cause
Other Bosch codes with the same cause
- --341 — The temperature measured by the flow temperature sensor or the return temperature sensor…
- 1022 W — Storage cylinder temperature sensor defective or contact problems
- 1025 W — Return temperature sensor defective
- 1065 W — Water pressure sensor defective or not connected
- 1068 W — Outdoor temperature sensor or lambda sensor defective.
- 1074 — No signal from flow temperature 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 Bosch boiler fault code 1037 W mean?
Outdoor temperature sensor defective, substitute mode heating active.
How do I fix fault code 1037 W on a Bosch 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 Bosch fault code 1037 W?
That depends on the exact cause. In the Bosch parts overview at Instalpunt you will find the current price and stock for each part.
Can I fix fault code 1037 W 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 Bosch boiler faults and codes at a glance →