17
TROUBLESHOOTING
Continued
OBSERVED PROBLEM
POSSIBLE CAUSE
REM EDY
Ignition failures
(continued)
5. Burner cycles off and glo-bar comes
on immediately, check the following:
5. A. Check flame sensing probe. Be sure probe is
positioned in the burner flame and glowing
cherry red. Check wire and wire connections
at probe and ignition control.
B. If wire and wire connections okay, check for
voltage across brown and orange wires at
ignition control. If no voltage, replace ignition
control.
C. If voltage present, check wiring and wire
connections at valve.
D. If wire and wire connections okay, replace
valve.
Excessive noise
1. Blower out of balance
2. Motor hums
1. Replace blower
2. Replace motor
Main burner will not cycle off
1. Thermostat setting
2. Gas Valve stuck open
1. Check thermostat
2. Check gas valve. If stuck open, replace.
Do not attempt to repair valve!
Furnace will not operate
1. Wiring connections or shorts
1. Check all wiring to assure proper connection or
detect possible shorts.
18
Figure 20 - Wiring Diagram (25,000 BTU/Hr Model)
Figure 21 - Wiring Diagram (40,000 BTU/Hr Model)
WIRING DIAGRAMS
REPLACEMENT
PARTS
Note:
Use only original replacement parts.
This will protect your warranty coverage for
parts replaced under warranty.
PARTS UNDER WARRANTY
Contact authorized dealers of this product.
If they can't supply original replacement
part(s), call:
Suburban Manufacturing Company
Customer Service Department
(423) 775-2131, Ext. 1
Have ready:
•
your name
•
your address
•
model and serial number of your furnace
•
how furnace was malfunctioning
•
type of gas used (propane/LP or natural
gas)
•
purchase date
Usually, we will ask you to return the defec-
tive part to the factory.
PARTS NOT UNDER
WARRANTY
Contact authorized dealers of this product.
If they can't supply original replacement
part(s), either contact your nearest gas
company or call :
Suburban Manufacturing Company
Customer Service Department
(423) 775-2131, Ext. 1
When calling Suburban, have ready:
•
model number of your furnace
•
the replacement part number
•
part description
•
number of parts required
SERVICE HINTS
W hen Gas Pressure Is Too Low
•
glo-bar glows, but burner will not ignite
W hen Gas Quality Is Bad
•
burner will not stay lit
•
burner will produce flames and soot
You may feel your gas pressure is too low or
gas quality is bad. If so, contact your local
gas supplier.
TECHNICAL SERVICE
You may have further questions about in-
stallation, operation, or troubleshooting. If
so, contact:
Suburban Manufacturing Company
Customer Service Department
Post Office Box 399
Dayton, Tennessee 37321
(423) 775-2131, Ext. 1
Fax: (423) 775-7015
