Boiler Error Codes
Boiler Brands We Diagnose & Repair
We repair boiler fault codes, across all major brands, including, but not limited to:
- Worcester Bosch boiler error codes (EA, E9, ER, A1)
- Vaillant boiler fault codes (F22, F28, F29)
- Ideal boiler error codes (F1, F2, F4)
- Baxi boiler fault codes (E119, E133, E168)
- Glow-worm boiler errors (F22, F28, F29)
- Potterton boiler fault codes (E133, E119)
- Viessmann boiler error codes (F2, F4, F5)
If your boiler brand or code isn’t listed, we can still help.
Boiler Error Codes We Repair
Worcester Bosch Boiler Error Codes
If your Worcester Bosch boiler is showing an error code such as EA, E9, A1 or ER, it usually means ignition failure, overheating, or pressure issues.
Our Gas Safe engineers regularly fix:
- Low pressure faults
- Overheating shutdowns
- Repeated reset failures
Ideal Boiler Error Codes
An Ideal boiler error code such as F1, F2 or F4 usually means pressure loss, ignition failure, or fan issues.
We fix:
- Boiler lockouts
- Pressure-related shutdowns
- Fan and airflow faults
Vaillant Boiler Fault Codes
Seeing a Vaillant boiler error code like F22, F28 or F29? These faults often stop heating and hot water completely.
We diagnose and repair:
- Low water pressure faults
- Ignition and flame failure
- Gas supply and sensor issues
Potterton Boiler Fault Codes
Potterton boiler faults such as E133 or E119 commonly cause complete boiler shutdowns.
We provide:
- Rapid fault diagnosis
- Safe repairs
- Long-term solutions
Viessmann Boiler Error Codes
A Viessmann boiler error code like F2, F4 or F5 often requires specialist knowledge.
We repair:
- Sensor failures
- Overheat shutdowns
- Burner and ignition faults
Baxi Boiler Fault Codes
Common Baxi boiler error codes like E119, E133 and E168 indicate pressure faults or ignition failure.
We help with:
- Low system pressure
- Flame detection issues
- Control board faults
Glow-worm Boiler Error Codes
If your Glow-worm boiler shows F22, F28 or F29, it often won’t restart without professional repair.
Our engineers resolve:
- Pressure drops
- Ignition problems
- Faulty sensors
Common Boiler Error Codes Explained
Different manufacturers use different codes, but here are some of the most frequent ones seen on UK boilers and what they often mean:
Common Fault Codes
E119 – Low Water Pressure
F28 / F29 – Ignition Problems
E133 – Gas Supply Issue
Fan & Sensor Faults (e.g., E50, E160)
Overheating or Flow Errors (e.g., E1 / E4 / E5)
*Note: Exact meanings vary by boiler make and model — always refer to the manufacturer’s manual for specific definitions.
Finance Available
Spread the cost of eligible plumbing and heating work with flexible finance through TradeHelp. 11.9% APR Representative. Finance subject to status.
Direct Plumbing and Heating Ltd is an Introducer Appointed Representative of TradeHelp for the purpose of credit broking introductions only. Our firm reference number is 1058647. TradeHelp is a trading style of TradeHelp Ltd, Marchwiel Centre, Bryn Lane, Wrexham Ind Est, LL13 9UT, registered in England (03712438), authorised and regulated by the Financial Conduct Authority (firm reference number 697812). TradeHelp are a credit broker, not a lender, and offer loans from a small panel of carefully selected lenders. TradeHelp do not offer financial advice and do not charge you for credit broking services. All loans are subject to status.
FAQs – Boiler Error Codes