Question about Rinnai Toyostove Direct Vent Heater: Toyostove Laser 73 Shipping

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I have a 41 monitor k1

Ignitor comes on but the pump does not kick in

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Monitor and Toyo are basically the same. They both use a solenoid type fuel pump. The pump can be taken apart but you will NEVER get it back to working condition, so don't open it up. Clean off the stainless steel mesh screen with gumout - works best. The solenoid pump operates off a relay on the computer board and the pump's controller that provided pulsing to the solenoid. Remove the copper pump tube off the pot ONLY when it's cool or slightly warm. The bulkhead fitting is brass, but the gland nut on the tube is steel and they expand at different rates.

Posted on Oct 23, 2009

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A Monitor 41 could be 20 years old now. When you say the iginter works does that mean the burner heats up around the igniter? If it does then the igniter is probably OK. Now for the pump. Is it cold or snowy where you live? If so, you should check the exhaust pipe to make sure it does not have ice or frost on it. Either will cause the fuel pump not to come on. Monitors are a little tricky to work on if you are not sure whats up. Be very careful removing the fuel nozzle to check for fuel flow. Don't remove it if it is hot, you run the risk of twisting it off the pot. If you are not handy with all things mechinical I would look for a dealer to help you out.

Tom Hawkins

Posted on Jan 07, 2009

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I'm not real familiar with Monitor heaters, but if they are like Toyos, you may need to replace the pump.

Posted on Jan 05, 2009

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1 Answer

I am working on a monitor 2400. heater will run normal until it reaches set temp. when it goes to mid burn the flame goes out and code 14.

E14 Flame failure: There are obstacles at circulation air inlet or outlet. Fan cage is clogged with dust. Gas pressure dropped when other gas appliances are turned on. (this may also apply to K1 fueled units if you have another K1 based heater)

Here are the rest of the fault codes I found:

Digital Display Reason of indication Trouble Point
E01 At pre-purge, flame rod is sensing flame when there should be none. Flame sensing circuit, grounded flame rod or pinched wire. E05 After power on, power supply to the microprocessor timing circuit is incorrect. Timer clock circuit bad or power cycles (hertz) to unit above or below acceptable levels.
E06 A starting of operation, the circuit to drive photo triac of solenoid pump is malfunctioning. Solenoid pump control circuit has a malfunction.
E08 Revolutions per minute of combustion blower are malfunctioning. Combustion blower or combustion blower control circuit has a malfunction.
E13 No ignition. Failure of ignitor, solenoid pump or circuit board. Incorrect wiring or flame rod touches to burner parts. Air pressure switch or overheat open.
E15 Power supply voltage too low. Voltage too low or power detector circuit has a malfunction.
E16 Load failure of combustion blower motor Flue pipe is restricting air flow.

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All Pro 200t Will not ignite

John- the ignitor does not stay on for the duration of the running time. It only stays on for the first 5 seconds. This is long enough for the flame to ignite and perpetuate itself, assuming the fuel delivery system is up-to-par. The photocell monitors the flame color and if the flame becomes off-color then the photocell tells the control board to shut the unit down. Naturally, too rich or too lean affects flame color.

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