Coleman 5040-761, 5040B747 manual Troubleshooting, Service, Problem, Possible Cause, Solution

Troubleshooting

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
NOTE: Do not operate	Outdoor temperature is less than 40° F	Use a full cylinder
heater below 0° F.	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)

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 13