Electrical Troubleshooting - Heatmaster G Series Operation And Maintenance Manual

4. Check control for errors that may have shut the
furnace down .
5. If all checks have not corrected the problem have a
technician check the control panel .
If there is a power failure:
1. Open all flow-check and zone valves in the system.
Depending on the system design, this may allow
convective circulation .
Note: This does not apply to gravity systems, as they
have no flow-check valves and will continue to operate
normally without electricity.
2. It is important to remember that the heating systems
cannot dispose of a great deal of heat without the
circulator(s) running. Avoid over-firing!
DO NOT LOAD LARGE AMOUNTS OF SOLID FUEL
INTO THE FURNACE!
Fire the furnace cautiously until you are able to
determine how quickly the heating system is able to
absorb the heat being produced by the furnace.
3. When the power has returned, reset all flow-check
and zone valves and resume normal operation of the
system .
If there is smoke leaking out of the door:
1. Check to ensure the door is sealing properly.
2. If the seal is worn out it will have to be replaced.
3. The door may need to be adjusted. To do this loosen
the door latch bearings and nuts on the door hinge
and set the door so it seals tightly against the door
jamb. Re-tighten once the door is in place.

ELECTRICAL TROUBLESHOOTING

Electrical troubleshooting should always be done by a
qualified technician.
High Limit Switch:
Using an electrical testing meter check for power on both
poles of the high limit switch .
If the furnace temperature is above 195° F. the switch
—
should be OPEN and there should only be power on
one pole of the switch . If the furnace was over 195° F .
and the switch has opened the water will need to cool
down to approximately 140° F. before it will close and
26 Heatmaster G Series Furnace Operating Manual
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If the furnace has an excessive amount of creosote:
1. Check to ensure the furnace is sized accurately
according to heat demand. If the furnace is oversized
it will idle and cause this .
2. Check moisture content in your wood fuel. Moisture
content over 30% may cause creosote buildup.
Recommended moisture content in your wood fuel is
15-25% .
3 . Remove the access panel at the rear of the furnace
and inspect the bypass door for smoke leakage.
4. If the chimney and/or heat exchange tubes become
plugged with creosote it will be necessary to scrape
the creosote out to obtain a proper burn in the firebox.
You are having to fill the furnace with water more
than once a week or more than a few gallons of
water per week and there is no obvious explanation:
1. Check the temperature settings and gasket on the
door and lower combustion chamber door to ensure
the furnace is not over temperature and steaming .
If water temperature reaches levels over 200° F the
water will steam and water loss will occur .
2. Check the perimeter of the furnace for water puddles
collecting or dripping from the furnace .
3. Check all plumbing in the system to ensure there are
no leaks .
4 . If these checks have not provided an answer call your
dealer .
allow power through once again .
If the furnace has not overheated (190° F+) but there is
—
still power on only one pole of the switch, the switch is
faulty and should be replaced.
If there is no power on either pole check for power at
—
the main power switch at the rear of the furnace .
Control power supply switch:
Using an electrical testing meter check for power on both
poles of the power supply rocker switch . The switch has
power in, neutral, and power out poles . During normal