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My Monitor 441 won't ignite. I hear ticking (pump running) and verified that the keorsene is going through the solenoid. There is no ignition and then it times out. Can you help?

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  • btro Oct 09, 2010

    I have proven that I have fuel to the burner as you stated. Based on your response, I did break the connection and clean out the port line to the burner, which was indeed very black and gunky; great suggestion with the paper clip. However, I still do not get any spark to ignite the burner(that area does not get hot). I did take out and clean the flame sense (didn't look bad). Is the ignitor a hot surface ignition part? I am having a difficult time getting the ingitor out as the screw head is nearly stripped. Is the ignitor "cleanable"?
    We just moved in a year ago, so I'm not sure of the last Service.....looks like it may be time for one. Thanks so much for your assistance.

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When you say fuel is going through the solenoid, do you mean you removed the fuel line from the burner and fuel comes out the line when you try to start? If so, you have proved the fuel system from the tank, fuel sump and fuel pump is good. Now, does the igniter get hot? Feel around the lower area where two white wires go into the burner, it should get warm. Remove the window and clean it. You will have to replace the gaskets, as they may break. Stick a paper clip down the fuel nozzle about 3 inches to clear any carbon. Remove the flame sensor and clean it. Same thing with the gasket. Put all back together and try it again. If you see flame and the stove quits you have a problem with the burner.
If there is no flame, you have an iginter problem. This will be very clear when you remove the igniter.
When was the last time the stove was serviced? If it was more than two years ago you need a service.

Good luck,

Tom

Posted on Oct 09, 2010

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Secondary air ignition malfuction


This code can set for more than the pump not running. It could be a sensor issue that reads it, too high of pressure, just to name a few.

Circuit/System Verification
Verify that DTC P0412, P0418, P2430-P2433, P2440, or P2444 are not set.
* If any of the DTCs are set, perform those diagnostics first.
Ignition ON, command the AIR Pump Relay ON and OFF with a scan tool. The AIR pump should turn ON and OFF.
* If the AIR pump does not turn ON or OFF, refer to Secondary Air Injection Pump Malfunction
Command the AIR Solenoid ON and OFF with a scan tool. The AIR solenoid valve should click with each command.
* If the AIR solenoid valve does operate as specified, refer to Secondary Air Injection Solenoid Valve Malfunction.
Engine running, command the AIR Pump Relay ON with a scan tool while observing the AIR Pressure Sensor parameter. The reading should be 15-20 kPa above the BARO reading.
* If less than the specified range, refer to Secondary Air Injection System Pressure Low.
* If greater than the specified range, refer to Secondary Air Injection System Pressure High.
Engine running, command the AIR System ON while observing the AIR Pressure Sensor parameter. The reading should be 7-10 kPa above BARO.
* If less than the specified range, refer to Secondary Air Injection System Pressure Low.
* If greater than the specified range, refer to Secondary Air Injection System Pressure High.
Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing
Secondary Air Injection Pump Malfunction

Ignition OFF, disconnect the AIR pump relay.
Ignition ON, verify that a test lamp does not illuminate between the controlled output circuit terminal 87 and ground.
* If the test lamp illuminates, test the controlled output circuit for a short to voltage.
Verify that a test lamp illuminates between the AIR pump relay coil ignition circuit terminal 85 and ground.
* If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, replace the AIR pump relay and/or the AIR solenoid relay.
Verify that a test lamp illuminates between the AIR pump relay switch B+ circuit terminal 30 and ground.
* If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the B+ circuit fuse is open, test the controlled output circuit for a short to ground.
Ignition OFF, disconnect the harness connector at the AIR pump.
Test for less than 2 ohms between the AIR pump ground circuit terminal B and ground.
* If greater than the specified range, test the ground circuit for an open/high resistance.
Connect the harness connector at the AIR pump.
Connect the J 36169-HD with a 60A fuse between the AIR pump relay switch B+ circuit terminal 30 and the controlled output circuit terminal 87. Verify the AIR pump is activated.
* If the AIR pump does not activate, test the controlled output circuit for an open/high resistance. If the circuit tests normal, test or replace the AIR pump.
Remove the J 36169-HD jumper wire.
Connect a test lamp between the AIR pump relay coil ignition circuit terminal 85 and the AIR pump relay control circuit terminal 86.
Ignition ON, command the AIR Pump Relay ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
* If the test lamp is always ON, test the AIR pump relay control circuit for a short to ground. If the circuit tests normal, replace the ECM.
* If the test lamp is always OFF, test the AIR pump relay control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the ECM.
If all circuits test normal, replace the AIR pump relay.

Secondary Air Injection Solenoid Malfunction
Ignition OFF, disconnect the AIR solenoid relay.
Ignition ON, verify that a test lamp does not illuminate between the controlled output circuit terminal 87 and ground.
* If the test lamp illuminates, test the controlled output circuit for a short to voltage.
Verify that a test lamp illuminates between the AIR solenoid relay coil ignition circuit terminal 86 and ground.
* If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, replace the AIR solenoid relay and/or the AIR pump relay.
Verify that a test lamp illuminates between the AIR solenoid relay switch B+ circuit terminal 30 and ground.
* If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the B+ circuit fuse is open, test the controlled output circuit for a short to ground.
Ignition OFF, disconnect the harness connector at the AIR solenoid.
Test for less than 2 ohms between the AIR solenoid valve ground circuit terminal 4 and ground.
* If greater than the specified range, test the ground circuit for an open/high resistance.
Connect the harness connector at the secondary AIR solenoid.
Connect a 15A fused jumper wire between the AIR solenoid relay switch B+ circuit terminal 30 and the controlled output circuit terminal 87. Verify the AIR solenoid valve is activated.
* If the AIR solenoid valve does not activate, test the controlled output circuit for an open/high resistance. If the circuit tests normal, test or replace the AIR solenoid.
Remove the 15A fused jumper wire.
Connect a test lamp between the AIR solenoid relay coil ignition circuit terminal 86 and the relay coil control circuit terminal 85.
Ignition ON, command the AIR Solenoid ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
* If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the ECM.
* If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the ECM.
If all circuits test normal, replace the AIR solenoid relay.

Secondary Air Injection System Pressure Low
Engine running, inspect for exhaust leaks between the AIR solenoid valve and the catalytic converter.
* If an exhaust leak is detected, repair as necessary.
Ignition OFF, disconnect the AIR pump relay.
Engine running, connect the J 36169-HD with a 60A fuse between the AIR pump relay switch B+ circuit terminal 30 and the controlled output circuit terminal 87. Verify the AIR Pressure Sensor parameter is not 15-20 kPa above BARO.
* If 15-20 kPa above BARO, replace the AIR pump relay.
Ignition OFF, remove the J 36169-HD jumper wire and connect the AIR pump relay.
Remove the air inlet hose at the AIR pump.
Engine running, command the AIR System ON while observing the AIR Pressure Sensor parameter. Verify the reading is not 7-10 kPa above BARO.
* If 7-10 kPa above BARO, the AIR pump inlet hose/pipe assembly is restricted. Remove the restriction or replace the hose/pipe assembly.
Ignition OFF, disconnect the hose at the AIR pump outlet.
Disconnect the hose at the AIR solenoid valve inlet.
Install a length of standard 1 inch I.D. (25.4 mm) hose from the AIR pump outlet to the AIR solenoid valve inlet.
Engine running, command the AIR System ON while observing the AIR Pressure Sensor parameter. Verify the reading is not 7-10 kPa above BARO.
* If 7-10 kPa above BARO, test/inspect AIR pump outlet hoses/pipes for leaks or restrictions.
Test all AIR pump wiring and connections for less than 2 ohms. If the wiring and connections test normal and the hoses/pipes are OK, replace the AIR pump.

Secondary Air Injection System Pressure High
Ignition OFF, remove the AIR solenoid valve.
Connect the AIR pump outlet pipe/hose at the AIR solenoid valve.
Connect the AIR solenoid valve harness at the AIR solenoid valve.
Engine running, command the AIR system ON while observing the AIR Pressure Sensor parameter. The reading should be less than 11 kPa above BARO.
* If greater than the specified value, replace the AIR solenoid valve.
Inspect the AIR solenoid valve gaskets for proper alignment. If normal, test/inspect the AIR solenoid valve outlet pipe, exhaust manifold, and cylinder head for a restriction.

This issue and its repair may be under GM warranty. I think it would be worth your time to check at the dealer.

Hope helps.

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1 Answer

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You do not say whether the engine is running at the time that you hear the ticking. It is not uncommon to hear a fuel pump ticking before an engine is started if the ignition is switched on. This is simply the pump pushing fuel up to the engine if it has drained back in the fuel lines slightly, whilst the vehicle was parked.
In some cases it might indicate a faulty pump.

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1 Answer

My monitor heater 441 comes on but after 3 mins.or so the burner lights come on full then starts blinking still no flames no heat.


Not a lot of details to go on. Does the pump make a loud ticking sound? That would mean it isn't getting any fuel to it and you would need to check your filter and the strainer in the fuel sump. You may need to check your igniter also. If it isn't working the heater will not light and kerosene will be building up in the burner everytime you try to light it. If you have a clamp on ammeter you can clamp around 1 of the igniter wires and should get 2 - 4 amps when you turn the heater on. If this doesn't help you can email me a nitensheaterservice@earthlink.net.

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1 Answer

My Monitor 441 will not ignite?


Lane,

When you try to light the heater do you ever hear a thumping noise? If so, you have a fuel delivery problem. If you never heat the thumping noise you have a fuel pump or air safety switch problem. If it's been snowy you could have a covered flue pipe. This will cause the fuel pump not to come on. If your Monitor is your only source of heat I would be looking for a local repair guy that knows the Monitor heater.

Tom Hawkins
hawkins111@gci.net

Mar 03, 2009 | Heating & Cooling

1 Answer

I have a monitor 441 and it will not ignite! I cleaned the strainer, and the igniter is getting warm. But, no flame? help anyone??


Lane,

Do you hear a thumping noise on the lower right side of the unit just before it starts flashing the light bars? If so you have a fuel supply problem. If there is no thumping noise I would check the flue pipe on the outside to be sure it is clear. Lastly I would remove the copper fuel pipe from the burner and try to start the stove. If fuel comes out the pipe the pump is good. If fuel comes out I would stick a paper clip down the fuel nozzle about 3 inches, it could be blocked with carbon. If no fuel comes out the pipe, you will need to get a manual or a tech to help you out. The choices would now be fuel pump or main board, both of which are pricey so you don't want to make a mistake.

That being said, when was the last time you had the burner serviced? Mat, ring and all the gaskets involved? A Monitor 441 needs to be looked at about every 3 years to be sure you get through the heating season.

Good luck,

Tom Hawkins
hawkins111@gci.net

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13 Answers

Operating manual for MPI monitor heater


You can obtain an electronic copy of the 441 owner's manual from http://www.monitorproducts.com/customer-support/manuals

Scroll towards the bottom of the page to find the 441 or 442 manuals.

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2 Answers

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sequence of operation is just like the monitor. combustion blower comes on to purge chamber of fumes. after the delay, the solenoid pump comes on and deposits fuel to the burner mat, within 20 sec the igniter comes on, incandesces and ignites the fuel if there is no flame, the flame rod is supposed to shut down heater and go into a lockout condition until shut off or unplugged to reset. check solenoid pump first. you already know the igniter works. check the fuel filter in the fuel sump might be clogged. check the fuel sump float valve, might be stuck, supposed to hang free in the sump with needle valve open. thermostat is digital just starts and shuts down the burner and solenoid pump.

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