Bosch fault code OL
Fault code OL on a Bosch boiler (including Condens 7000F) means: Opening of the gas valve. Reset the appliance once. If the code comes back, a part is usually faulty. 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 OL on a Bosch boiler indicates: Opening of the gas valve.
Fixing fault code OL: step by step
- Check that the gas valve at the appliance is open and that other gas appliances, such as the hob, are getting gas.
- Reset the appliance once. If the code comes straight back, do not keep resetting it.
- If the code comes back, the problem is the gas supply or the gas valve. Work on gas-carrying parts is for a qualified heating engineer.
- Smell gas? Close the gas valve, open windows and doors and call the gas emergency service straight away.
Applies to
Bosch Condens 7000F, 100 kW L / R, 150 kW L / R, 200 kW L / R, 300 kW L / R, 75 L / R, Condens 7000FP, 350 L / R, 400 L / R, 500 L / R.
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.
This message does not point directly to one faulty part. These are the parts that most often fit this appliance:
Bosch pressure gauge 2,5 bar 63mm AE D3/8"U € 8.47
Nefit siphon gasket per 5 pcs for EcomLine and TopLine € 23.99
Bosch sealing ring 10x13,5x1,5 CU gas valve 8718584813 € 33.87
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 OL mean?
Opening of the gas valve.
How do I fix fault code OL 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 OL?
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 OL 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 →