Johnson & Starley error codes
The complete list of Johnson & Starley fault codes shown on the display, each with what it means and the page that explains how it is diagnosed and fixed.
Johnson & Starley heating appliances display 13 documented error codes. Each code below opens its own page with the official meaning, the documented causes, the safety assessment and the parts involved.
All Johnson & Starley Error Codes
13 codes, each with its own page. Click a code to open the meaning, the documented causes and the repair.
What Fails Most Often on Johnson & Starley
Grouped from the official meaning of each of the 13 codes above — not from opinion. The number is how many different fault codes point at that component.
| Component | Codes | Examples |
|---|---|---|
| Temperature Sensor | 4 | E15, E33, E35, F07 |
| Water Pressure | 3 | F37, F40, F47 |
Parts & Prices
The parts most often involved in the Johnson & Starley faults listed above.
Prices and availability vary by region and are shown by the retailer, not by TroubleAtlas.
Diagnostic Tools
What an engineer uses to work through the codes on this page.
TroubleAtlas Score — Johnson & Starley
How Johnson & Starley scores
Independently assessed across six dimensions from the documentation, the fault codes and the parts network. Based on 26 error codes across 9 appliances.
How we calculate it →TroubleAtlas Pro
Get cited by AI. Get found by customers.
TroubleAtlas Pro puts your business in front of homeowners searching for Johnson & Starley faults, and structures your listing so AI assistants can cite you as a trusted source.
Explore TroubleAtlas Pro →Considering a New Heating System
Considering a New Heating System?
If your Johnson & Starley appliance is over 10 years old, replacing it with a modern condensing boiler or air-source heat pump could cut energy bills and remove the recurring faults listed on this page.
Compare Heating System Prices →
YouTube Channel
Watch the fixes. Follow the channel.
Step-by-step boiler repair guides, equipment reviews and heating system comparisons from qualified engineers.
New fixes every weekFix in 5
Quick fixes for common boiler faults explained in under 5 minutes
Boiler Comparator
Side-by-side comparisons of popular boiler models
Boiler Reviews
Independent reviews with TroubleAtlas Score ratings
Find a Specialist
Don’t fix it alone. Find a trusted heating engineer near you.
TroubleAtlas connects you with vetted local heating professionals who can inspect, diagnose and repair your Johnson & Starley appliance safely — no guesswork, no unnecessary call-outs.
Local heating professionals are coming to your area
We’re onboarding Gas Safe registered and licensed HVAC engineers city by city. Check back soon, or search above to see current availability.