Adams Condensing Oil-Fired Furnace operation manual System and General Troubleshooting

Table 1	System and General Troubleshooting
PROBLEM		POSSIBLE CAUSE		REMEDY
		Thermostat not calling for heat.	Check thermostat and adjust. Be sure it		is accurate. If it is mercury type be sure it
			Is level.
		No I)OWer to furnace.	Check furnace switch and main electrical Dane! furnace fuse or circuit breaker.
		Thermostat faulty.	Remove thermostat wires from the oil primary control terminal T·T. Put a jumper
			across T-T. if furnace starts, reolace thermostat, thermostat sub-base or both.
Furnace will not start		Oil primary control faulty.	Check reset button on 011 primary control. Remove thermostat wire from oil primary
			control terminal T1 -12.Check for 24 v. across T-T.lf movoltage is present, check
			for 115v. tooiIDrimarv.1f115v.1s		t 0 Drimarv control diaanostics.
		Cad cell wiring shorted or room light	Check cad cell wiring for short circuits. Check for room light leaking into cad cell
		leaking into cad cell compartment.	compartment.. Repair light leak if necessary.
		Open safety switch	Check for open high limit, auxiliary limit, pressure or door Interlock switch.
		No Fuel 011	Check fuel oil supply. Check that all hand operated fuel oil valves are in the open
			DOSition. Fill oil storaae tank if necessary.
		Clogged nozzle.	Replace nozzle with high quality replacement. Use rating plate or Tables In
Furnace will not start			Appendix A as a gUide.
			Replace oil tank filter or in-line filter if used.
		Clogged oil filter.
without first pushing oil
primary control reset		Low oil pump pressure.	Connect pressure gauge to 011 pump. Adjust pump pressure, or replace oil pump if
button.			necessary. Ensure that erratic pressure readings are not caused by defective fuel
(Occurs frequently)			oil line.
		Air getting into fuel oil lines, or fuel oil	Check fuel 011 lines. Replace any compression fittings found with high quality flared
		line dirty, clogged, or in some	fittings. Check for any signs of oil leaks. Any oil leak Is a potential source of air or
		manner defective.	contaminants.
		Defective burner motor.	Check burner motor. If burner motor Is cutting out on over-load, determine why.
			Replace if necessary.
		Cad cell Is dirty or defective	If cad cell is dirty, clean it. (Determine why cad cell Is getting dirty). If cad cell is
			poorly aimed, realign it. NOTE: The photocell should have a resistance of 100K
			ohms In absence of light, a maximum of 15000hms in the presence of light.
			Ensure that room light Is not leaking into the cad cell compartment. (See diagnostic
			liaht sectian\.
		No fuel oil.	Check fuel oil supply. Check that all hand operated fuel oil valves are in the open
Furnace starts, but			POsition. Fill oil storage tank if necessary.
shuts off requiring		Clogged nozzle.	Replace nozzle with high quality replacement. Use rating plate or Tables In
manually resetting the			ArlOendix A as a lJuide.
primary control reset
button.		Clogged 011 filter.	Reolace oil tank filter or in-line filter if used.
		Low oil pump pressure.	Connect pressure gauge to oil pump. Adjust pump pressure, or replace 011 pump if
			necessary. Ensure that erratic pressure readings are not caused by defective fuel
			oil line.
		Air getting Into fuel 011 lines, or fuel 011	Check fuel oil lines. Replace any compression fittings found with high quality flared
		line dirty, clogged, or in some	fittings. Check for any signs of oil leaks. Any oi/leak Is a potential source of air or
		manner defective.	contaminants.
		Defective burner motor.	Check burner motor. If burner motor is cutting out on over-load, determine why.
			Reolace If necessary.
		Water or contaminants in oil.	Drain fuel oil storaae tank and reoIace fuel 011. (Consult with fuel oil suPDIier).
		Frozen oilUne.	GentJy warm oil line. Insulate 011 line. (Outdoor piping size may reqUire increased
			diameter).

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