Coleman 5040-761 - Manual (Page 13)

Problem Possible Cause Solution
Pilot won’t light Cylinder valve is closed Open valve
Blockage in orifice or pilot tube Clean or replace orifice or pilot tube
Air in gas line Pilot may take 1-2 minutes to light after a propane bottle
has been connected
Low gas pressure with Cylinder Valve Cylinder is empty. Replace cylinder
fully open
Igniter fails Use match to light pilot. Obtain new igniter and
replace
Heater control knob not fully Depress heater control knob firmly in light position
depressed in pilot position when when lighting pilot
lighting pilot
No spark at burner electrode Use match to light pilot. If wire to electrode is
damaged - replace with new wire and/or carbon
across spark gap
Pilot won’t stay lit Dirt built up around pilot Clean dirt from around pilot
Connection between gas valve and Tighten connection and perform leak check
pilot assembly is loose
Thermocouple is not operating Tighten all thermocouple connections. Replace
correctly if faulty
Burner won’t light Gas pressure is low Turn Cylinder valve OFF and replace cylinder
Blockage in orifice Clear blockage
Control knob is not in ON position Turn control knob to ON
Light won’t light Gas pressure is low Turn Cylinder valve OFF and replace cylinder
Blockage in orifice Clear blockage
Control knob is not in ON position Turn control knob to ON
Igniter fails Use match to light pilot. Obtain new igniter and
replace
Burner flame is low Gas pressure is low Turn Cylinder valve OFF and replace cylinder
Outdoor temperature is less than 40° F Use a full cylinder
and tank is less than 1/4 full
Supply hose is bent or kinked Straighten hose
Control knob fully ON Check burner and orifices for blockage
Carbon build-up Dirt or film on reflector and burner screen Remove blockage from burner screen holes and clean
burner screen inside and outside
Thick black smoke from Blockage in burner or in light gas passages Remove blockage and clean burner inside and outside
burner or light
Mantles light but dim Faulty Regulator (First insure cylinder Replace regulator
out when heater is valve is fully open and that cylinder is
turned on. not empty)
Pilot lights but Heater Faulty Regulator (First insure cylinder Replace regulator
flame is “lazy” or has valve is fully open and that cylinder is
low output. not empty)
13
Service
• Repair to gas passages and associated components should be done only by a qualified service person.
• Owner repair & service should be limited and performed only to the
following:
- Mantle replacement
- Glass replacement
- Reflector replacement
NOTE: Do not operate
heater below 0° F.
Troubleshooting