Monitor Heater Error Codes: M2400 and M2200 E13, E14

By Ray Bennett · Updated 23 October 2026 · 6 min read · Checked against the maker’s manual

Monitor Heater Error Codes: M2400 and M2200 E13, E14

Short answer

Monitor's M2400/M2200 service chart calls E13 no ignition and E14 flame failure. E14 alone does not prove an empty tank: the M2400 owner's guide also uses it for overheating and other symptoms. Record the model and code. Turn the heater off with its operation button, let the cooling fans finish, and leave internal repairs to service.

Monitor heater error codes need the model and what happened before shutdown. In Monitor’s M2400/M2200 service chart, E13 is no ignition and E14 is flame failure. E14 is not a diagnosis of an empty fuel tank by itself.

That distinction matters because the M2400 owner’s guide also displays E14 during an overheat shutdown and warns that other troubleshooting symptoms can produce it. Keep the code with the fuel level, airflow observations and any restart already tried.

This guide uses the M2400 and M2200 service table. The owner cooling and fuel directions below are specifically from the M2400 guide. For a Toyotomi unit, use the Toyotomi Laser code guide; its numbers belong to a different heater.

Before you start

What to carry: a torch, your heater manual and a phone for the display. Read the model from paperwork or an accessible label without removing the cover. Record whether the heater never lit or stopped after producing heat.

Gas or electric? This page is about the named Monitor liquid-fuel room heaters, not a gas furnace or an electric portable heater. The M2400 owner guide specifies crystal-clear kerosene and prohibits gasoline, white gas, camp fuel and other flammable liquids. Do not substitute another appliance’s fuel rule.

Renting? Send maintenance the model, code and known tank status. Include whether someone has already tried restarting it.

Turn it off at the button and preserve its cooling cycle.
For an abnormal condition, the M2400 owner guide says to turn the heater off, not unplug it, and contact the Monitor dealer. Its shutdown section says the fans continue running until the heater has cooled. Use the operation button and let that cooling run finish.

Monitor warns that the flue pipe and louver can be hot. Keep your hands clear of them and do not move a hot heater. Fuel leakage, soot or a loose exhaust connection needs service before another heating attempt.

The owner guide specifically says not to change a blown electrical fuse. Leave cover removal, fuel-line work, internal cleaning and electrical repairs to an appropriate service technician. This page’s checks stay outside the cabinet.

E13: no ignition is a condition, not a part number

Check 1Recording the symptom for professional diagnosis

Report a failed start with the full code

Monitor’s service chart defines E13 as no ignition. Its trouble-point column includes the igniter, solenoid pump or circuit board, wiring or flame-rod contact, and an open air-pressure switch or overheat device.

Those are possibilities for service to separate. The table does not tell an owner to order an igniter from the code alone. Do not reach through the louvers, bypass an air-pressure switch or touch the flame rod to test a theory.

Record the known tank level and whether ignition ever occurred. If you cannot establish the supply status safely, include that uncertainty in the service request. Our oil heating troubleshooting guide covers the wider no-heat complaint, but this room heater keeps its own instructions.

Monitor's M2400/M2200 service table distinguishes E13, no ignition, from E14, flame failure. Neither message selects a replacement part by itself.

E14: check the M2400 context before assuming no fuel

Check 2Known fuel status and outside airflow observations

Separate an empty tank from an overheat shutdown

Monitor’s M2400 empty-tank instructions describe E14 together with no heat and no flame. In that context, the guide says to turn the heater off with the operation button, refill the tank with kerosene, then use the button to turn it on.

Use a known tank reading or delivery record to establish the fuel situation. Do not assume that adding fuel is the answer while a tank still contains fuel or the heater has shown an overheating problem. Leave fuel-system draining, bleeding or disassembly to service.

In the M2400 overheat section, Monitor says a thermostatic switch stops kerosene flow and extinguishes the flame, with E14 displayed. Its service-chart E14 trouble points also include blocked circulation-air openings, dust in the fan cage and inadequate fuel supply.

Look for objects covering the front or blocking circulation behind the heater from a safe position. The M2400 overheat checklist also names the outside flue. Do not touch hot parts, dismantle the vent or climb to inspect an inaccessible terminal. Tell service about any visible obstruction you cannot safely remove.

A second M2400 overheat needs service

Check 3The owner shutdown boundary, with internal work left to service

Let it cool completely and stop repeated restarts

Monitor’s M2400 overheat recovery starts with the operation button off and complete cooling. Its stated cooling allowance is approximately 30 to 45 minutes before unplugging. Time alone does not replace the requirement for the heater to be fully cool.

The manual’s fuller recovery procedure includes internal cleaning and reassembly. Leave that work to service here; an outside obstruction check does not establish that the interior is clean or that the heater is safe to restart.

If the M2400 overheats a second time, its owner guide says to turn it off and contact the MPI dealer for service. The M2400/M2200 service manual also says not to operate a heater that overheats again until the problem has been diagnosed and corrected.

Keep the original code and the sequence of attempts for the technician. A cooled heater and a cleared display do not establish that the reason for shutdown has been repaired.

For M2400, E14 appears in both empty-tank and overheat instructions. After another overheat, Monitor requires shutdown and service rather than continued operation.

The other M2400/M2200 service codes

Check 4Circuit, blower or supply diagnosis using the service chart

Give the exact message to the technician

The same Monitor service table gives the following descriptions. These are the table’s reasons for indication, not owner repair procedures.

Display	Monitor’s service-chart description	Owner’s next useful action
E01	Flame rod senses flame during pre-purge when none should be present	Report the message and leave sensing and wiring checks to service
E05	Incorrect power supply to the microprocessor timing circuit after power-on	Report any known power interruption
E06	Solenoid-pump drive-circuit malfunction at startup	Arrange control diagnosis
E08	Combustion-blower speed malfunction	Report the code without opening the fan compartment
E15	Power supply voltage too low	Leave voltage measurements and electrical repair to service
E16	Combustion-blower motor load failure	Have the blower and vent path assessed

Monitor’s E15 trouble-point column includes low voltage or a power-detector circuit malfunction. Its E16 row names restricted airflow in the flue pipe. Preserve those diagnostic possibilities rather than choosing a board or motor from the number.

What each one takes

Finding	Work involved
E13	Ignition, fuel, sensing and safety-circuit diagnosis
E14 on an M2400	Separating known fuel depletion from overheat and airflow conditions
A second overheat	Shutdown and professional diagnosis before further operation
E15 or another electrical code	Qualified supply and circuit testing
A blown fuse	Service, as required by the M2400 owner’s guide

Questions people ask

Where is the Monitor heater error codes manual?

The manufacturer-authored M2400/M2200 service manual has the failure-mode table on printed page 62. The separate M2400 owner’s guide explains fuel depletion and overheating on printed pages 16 and 21.

Does E14 always mean the tank is empty?

No. The M2400 owner’s guide also uses E14 for overheating and says other symptoms can produce it. Keep the code with the actual tank and airflow observations.

What is E17?

The M2400/M2200 failure-mode table used here does not list E17. Record the model and exact display for service rather than taking a definition from another Monitor series.

Can I unplug a running heater to reset it?

The M2400 owner instructions say to turn it off with the operation button and let the fans finish cooling it. Its overheat procedure puts complete cooling before unplugging.

Does this cover Monitor 441 or 422?

No. This page uses the M2400/M2200 service table and labels its separate M2400 owner instructions. Those older models need their own manuals.

The other oil-heating guides: Toyotomi Laser codes, Riello burner lockout and oil heating with no heat.

Sources: Monitor Heating Systems M2400/M2200 Service Manual, cover, printed pages 36 to 37 and 62; Monitor M2400 Owner's Guide, copyright 2001, important caution and printed pages 16, 18, 21 and 24. Original manufacturer manuals saved from ManualsLib and MonitorParts.us; code glyphs verified on the rendered service table.