Dimplex OV 32 Fault codes & diagnostics

15 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.

Regular Natural Gas 32 kW 2008 onwards Discontinued
GC Number 41-149-03
Download the Dimplex OV 32 manual The official installation & service manual (PDF) — the exact document these fault codes were verified against. PDF

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Note it down before pressing reset — resetting clears the code immediately. How to read fault codes →

Severity at a glance

Each cell = one fault code. Hover to identify.
1 Emergency 14 High
Versions & GC numbers

Which version do you have?

The GC number on your boiler's data badge identifies the exact appliance and production years, as recorded in the UK Product Characteristics Database.

GC number Appliance (register name) Produced
41-149-03 OV 32 2008–present
Just want the most common Dimplex OV 32 faults?
The top 6 problems in plain English — with causes, DIY checks and repair costs.
Fault codes

All 15 documented codes

Tap any card for details

0

Your boiler is struggling to push water through the system properly, causing it to shut down shortly after the flame starts to prevent overheating.

High DIY-safe £120-£350

What to check first

  1. Check that all radiator valves are fully open
  2. Ensure the external pump is running if accessible
  3. Check the system pressure gauge and top up if below 1.5 bar
  4. Bleed all radiators to remove trapped air

Parts commonly replaced

  • Circulation pump
  • Flow switch
  • Main heat exchanger (flushing)

Related codes

Full explanation for 0
1

Your boiler has become too hot and has shut itself down as a safety precaution to prevent damage.

High DIY-safe £90-280

What to check first

  1. Check that all radiator valves are fully open
  2. Ensure the boiler pressure is between 1 and 1.5 bar
  3. Press the reset button on the front control panel
  4. Check for any visible leaks around the pipework

Parts commonly replaced

  • Circulation pump
  • Overheat thermostat
  • Thermistor (NTC sensor)

Related codes

Full explanation for 1
2

Your boiler is failing to stay lit because its internal sensors are detecting an unusual temperature difference, causing it to shut down for safety.

High Engineer only £120-280

Parts commonly replaced

  • Flow/Return thermistors
  • Circulation pump
  • Main PCB

Related codes

Full explanation for 2
3

Your boiler is failing to light the gas flame or keep it burning, which has caused the system to shut down for safety.

High DIY-safe £100-£350

What to check first

  1. Check if other gas appliances in your home, like a hob, are working to ensure your gas supply is on.
  2. If you have a prepayment meter, check that you have sufficient credit.
  3. Try resetting the boiler by following the instructions in your user manual.

Parts commonly replaced

  • Ignition electrode
  • Gas valve
  • Flame rectification sensor

Related codes

Full explanation for 3
4

Your boiler has switched itself off because its internal exhaust gases have reached an unsafely high temperature.

High Engineer only £120-£350

Parts commonly replaced

  • Flue gas sensor
  • Heat exchanger (cleaning)
  • Main PCB

Related codes

Full explanation for 4
5

Your boiler has likely overheated or a critical safety sensor has failed, preventing it from running for your safety.

High Engineer only £120-280

Parts commonly replaced

  • Temperature sensor (NTC thermistor)
  • Thermal fuse
  • Heat exchanger sensor
  • Circulation pump

Related codes

Full explanation for 5
6

Your boiler is still detecting a flame for a few seconds after it has been told to turn off, which is a safety concern that requires a professional inspection.

Emergency Engineer only £280-450

Parts commonly replaced

  • Gas Valve
  • Flame Sensing Electrode
  • Control Board (PCB)

Related codes

Full explanation for 6
7

Your boiler has stopped working because the internal fan is not spinning at the correct speed, preventing the boiler from lighting safely.

High Engineer only £250-£450

Parts commonly replaced

  • Fan assembly
  • Printed Circuit Board (PCB)
  • Wiring harness

Related codes

Full explanation for 7
A

Your boiler's internal computer has encountered a critical error or is failing to detect a flame, causing the system to stop working for safety.

High DIY-safe £280-450

What to check first

  1. Press the reset button once to see if the error clears
  2. Check that your gas pre-payment meter (if applicable) has credit
  3. Ensure other gas appliances in your home, like a hob, are receiving gas

Parts commonly replaced

  • Printed Circuit Board (PCB)
  • Ignition Electrode
  • Gas Valve

Related codes

Full explanation for A
b

Your boiler has failed to ignite a flame and likely needs a new internal configuration chip to be correctly set up by a professional.

High Engineer only £120-250

Parts commonly replaced

  • Boiler Chip Card (BCC)
  • PCB (Printed Circuit Board)
  • Ignition Electrode

Related codes

Full explanation for b
C

Your boiler has detected an internal safety error or failed to light properly, causing the system to shut down for protection.

High Engineer only £150-£450

Parts commonly replaced

  • Printed Circuit Board (PCB)
  • Gas Valve
  • Ignition Leads

Related codes

Full explanation for C
E

Your boiler's internal computer chip is missing or not communicating properly, meaning the system doesn't know how to operate correctly.

High Engineer only £120-280

Parts commonly replaced

  • Boiler Chip Card (BCC)
  • Main PCB (Printed Circuit Board)

Related codes

Full explanation for E
h

Your boiler is failing to light the gas flame properly because internal wiring or a connection has become loose or damaged.

High Engineer only £90-180

Parts commonly replaced

  • Ignition electrode lead
  • Wiring harness
  • Burner connector

Related codes

Full explanation for h
No light indication

Your boiler has no power and neither the display nor the lights are turning on, meaning the unit is not receiving electricity or a fuse has blown.

High DIY-safe £80-200

What to check first

  1. Check if your main consumer unit (fuse box) has tripped.
  2. Ensure the boiler's isolation switch (usually a red fused spur near the boiler) is turned on.
  3. Check if other appliances in the house are working to rule out a power cut.

Parts commonly replaced

  • Internal PCB fuse
  • Printed Circuit Board (PCB)
  • Fused Spur fuse
Full explanation for No light indication
P

Your boiler is struggling to operate because it isn't receiving enough electrical power or is failing to detect a flame.

High Engineer only £100-280

Parts commonly replaced

  • Printed Circuit Board (PCB)
  • Ignition Electrode
  • Gas Valve

Related codes

Full explanation for P