Burnham Boiler, no constant ignition.

The flame sensor, which is located in front of one of the burner flames is probably oxidized and needs cleaning or replacement. If the unit can't "sense" the flame, it will continue to cycle.

The ignition need a replacement.

Clean the flame sensor not the igniter . check air filter is clean .

check continuity of hot surface igniter....open loop means replace igniter

Power can be on just turn the room thermostat down .

I believe this code is ignition failure.
Turn power off and after 20 seconds turn power on with thermostat calling for heat. Vent blower should come on first. After a bit igniter should lite up. You should hear click noise of gas valve open up. If igniter does lite and you hear click noise, flame should come on for a few seconds minimum. If igniter doesn't lite and you hear click noise from gas valve, igniter is bad. If flame lites and then goes out, flame sensor probably needs cleaned. Both igniter and flame sensor are in metal plate under burners. Igniter has 2 wire going to it and flame sensor has one wire. If you think it is flame sensor you can remove with taking it out with 1 1/4" hex screw. Flame sensor will have white film on it if it needs cleaned, clean with steel wool or a dollar bill. If it isn't weither of these it is gas valve or circuit board.

On a call for heat, the 24 volt thermostat sends a signal to the control module. The control module will indicate a call for heat with a light on the control either blinking or remain solid depending upon model. The inducer (exhaust) blower will purge all gasses from the furnace and pressurize a pressure switch. Once the pressure switch tells the module to continue, the electronic ignition will energize and send 120 volts to the igniter. The igniter will glow and you will be able to see it if viewed thru the small inspection port. Once the igniter gets hot enough, it sends a signal to the module opening up the gas valve (24 volts). Either a pilot will come on or the burner tube will ignite then spread the flame to all burners. Lastly a safety sensor will be looking for a certain temperature within a few seconds and the furnace will continue to operate and the room air blower will turn on in a minute or two.

What could go wrong? The unit will not run if there is no signal from the thermostat (bad thermostat or broken wire), the control module does not sense a signal from the thermostat (bad control), the inducer does not energize (bad motor), the pressure switch does not close (blocked vent piping, bad switch, plugged condensate hose), the igniter does not energize (bad control, bad igniter), the gas valve does not open or there is no gas (bad gas valve, broken wire, no gas), the pilot does not light (dirty pilot), the burner does not light (bad burner, plugged orifice, not enough combustion air), the flame does not spread to each burner (bad flame spreader, dirty flame spreader, more bad burners), the flame safety sensor does not detect flame (dirty or bad flame spreader, bad flame sensor, broken wire, bad control), or the room air blower does not energize (bad fan motor, bad control).

check pressure switch for continuity with pump on

ONCE BURNERS HAVE LITE TURN THE BURNER KNOB BACK THE OPPOSITE WAY A LITTLE BIT AND SEE IF THR IGNITER QUITS SPARKING, HOPE THIS HELPS.

Replace the igniter. Even if it's glowing red hot, it is still likely the problem. Evidently the oven reads the resistance across the heating element, and when it doesn't detect enough resistance, it knows that the igniter is wearing out, thus not getting hot enough, and you're going to have a hard time igniting the gas. So, it won't turn on the gas -- how thoughtful of your oven to keep you from blowing up.

I had the same problem until I read all about it at http://fixitnow.com/wp/2004/09/19/appliance-repair-revelation-troubleshooting-a-gas-oven-that-wont-fire-up/

If you're in a bind and need to use your oven tonight (or you want proof that it's the igniter going bad), you can try stealing the igniter from the broiler and using it to replace the igniter for the main part of the oven. Since most people use the broiler less than the regular "bake" feature of the oven, that igniter lasts longer.