Troubleshooting - Heatmaster MF-3000 Owner's Manual

HeatMaster SS Outdoor Furnaces
If the furnace is running but fails to bring water up to temperature:
1. Check fire.
2. Check fan for operation.
3. Check that the solenoid damper is open to allow air injection.
4. Check to ensure the furnace is sized accurately according to heat demand.
5. Check fuel type. Poor quality fuel will not provide as many BTU's as high quality fuel.
6. Check water level of furnace.
7. Check for creosote blockage at chimney and bypass trough.
8. Check for blockage in venting and at the rear of the ash container where the air enters the
firebox.
9. Check temperature settings. Make sure high temperature setting is set to at least 165 F.
10. Check for power at furnace.
11. Check to ensure all pumps in the system are running.
12. Check to make sure there are no leaks, hot/wet spots on your ground or breaks in the pipe
or fittings which may cause the pipe to be saturated and lose its insulation value.
13. Check Temperature of water exiting furnace, entering the building being heated and
before and after each heat exchanger.
If the furnace water is hot but buildings do not have heat:
1. Check to ensure all pumps in the system are running..
2. Check filter cartridge for flow blockage (if installed).
3. Check for air in the system at the exchanger by bleeding off.
4. Check for closed valves to ensure water flow.
5. Check Temperature of water exiting furnace, entering the building being heated and before
and after each heat exchanger.
If the furnace overheats:
1. Check that all doors are closing properly and that door gasket is completely sealing.
2. Check that the solenoid damper plate is opening and closing without hang-ups.
3. Check venting and fan box on rear of furnace for air leaks
4. Check that the temperature settings are correct. The furnace should be set on Heating
Mode (H1)
5. Check chimney draft. If the chimney has been extended too far or has a strong wind
blowing over it, it may cause a draft down the furnace.
6. Check water level.
7. Make sure the door and ash drawer are air tight.
8. Check to ensure all pumps in the system are running.
If the furnace has shut down:
1. Check to ensure that the unit has power (does the light work?).
2. Check to ensure the Furnace On/Off switch is in the On position.
3. Check the water temperature (furnace has a high temperature cut out of 190 degrees F.
and turns on again at 140 degrees).
4. If all checks have not corrected the problem have a technician check the control panel.
If there is a chimney fire:
1. Make sure the firebox and ash pan doors are tightly closed.
2. Close all combustion air inlets on the furnace.
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TROUBLESHOOTING

TROUBLESHOOTING
MF Series
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