- Troubleshooting Guide • 4 Min Read
How to Fix a Baxi E133 Fault Code: 600 & 800 Combi
If your Baxi boiler is showing an E133 fault code, it usually means there’s a gas supply or ignition issue preventing your boiler from firing up.
This is one of the most common faults we see across Bolton and surrounding areas, especially during colder months when boilers are working harder. The good news? There are a few simple checks you can safely do yourself before calling an engineer.
What Does the Baxi E133 Fault Code Mean?
- Gas Supply Issue
- Falme Not Detected
- Ignition Failure
In many cases, it’s something simple, but sometimes it can point to a deeper fault. Below are the steps you can take to diagnose the issue.
Check Your Gas Pre-Payment Meter
This is the most common cause of an E133 fault. If your gas meter has run out of credit, your boiler won’t ignite and the E133 code will appear instantly.
What to do:
- Check your meter balance
- Top up if needed
- Wait a few minutes before resetting the boiler
Check for a Frozen Condensate Pipe
This is very common during winter in Bolton and Greater Manchester. If your condensate pipe is frozen, the boiler can lock out and display E133.
Signs to look for:
- Gurgling noises coming from the boiler
- Boiler not firing in cold weather
- External pipe frozen solid
What to do:
- Pour warm (not boiling) water over the external pipe
- Reset the boiler afterwards
Perform a Boiler Reset
Once you’ve checked the above, try resetting your boiler to clear the safety lockout.
How to reset a Baxi 600/800:
- Press and hold the reset button for 3-5 seconds
- Wait for the boiler to restart
- Check if the fault clears
If the fault keeps coming back after resetting, it usually means there’s a deeper issue. Read our guide on why your Baxi 600/800 keeps flashing E133 .
Still Showing E133?
To stop this happening again in the future, it’s worth understanding how to prevent E133 faults altogether. See how to prevent E133 ignition faults on your Baxi boiler .
Common underlying issues include:
- Faulty gas valve
- Ignition electrode failure
- PCB or wiring faults
Boiler Repair in Bolton (Fast, Fixed Price)
Tried the reset and it’s still failing? It could be a faulty gas valve or ignition electrode.
Book a Fixed Price £80 Boiler Repair in Bolton and we’ll have it firing again the same day where possible.
- No call out fee
- Gas Safe Expert
- 15+ Years Exp
- Fast Response
Verified Local Service
Because we’re locally based in Bolton, we offer fast repair response slots, transparent local pricing, and dependable aftercare support, not a national corporate call centre.
Boiler Repair in Bolton
Tried the reset and it’s still failing? It could be a faulty gas valve or ignition electrode. We’ll have it firing again the same day where possible.
Book a Fixed Price Repair
Transparent pricing. No hidden surprises..
- £80
- FIX FEE
- No Call-Out Fee Ever
- Same-Day Support Priority
- Gas Safe registered expert engineers
Constant Breakdowns? Signs You May Need A New Boiler
If your Baxi is constantly showing E133, the internal components might be failing. An upgrade could save you £400+ a year on bills.
Age Factor
Boiler is over 10–15 years old.
Rising Costs
Energy bills keep increasing.
Frequent Repairs
Constant breakdowns or callouts.
Strange Noises
Banging or whistling sounds
Uneven Heat
Cold spots around the house.
Safety Issues
Yellow flame or pilot light issues.
Visible Wear
Leaks or visible corrosion.
Outdated Tech
Lacks modern smart features.
- Heating and hot water not consistent? We can perform a full efficiency check.
Areas We Cover
Expert Baxi boiler repairs across all Bolton districts:
- BL1
- BL2
- BL3
- BL4
- BL5
- BL6
- BL7
Wider Coverage
- Horwich & surrounding areas
- Westhoughton & surrounding areas
- Farnworth & surrounding areas
- Little Lever & surrounding areas
- Harwood & surrounding areas
Why choose a local engineer?
Because we’re locally based in Bolton, we offer fast installation dates and reliable aftercare support, not a national call centre.
- Verified Local Service Provider