GE C2S985 Technical Service Manual

Also see for Appliances C2S985: Owner's Manual & Installation Instructions Owner's Manual & Installation Instructions Owner's manual and installation instructions Owner's manual and installation instructions Owner's Manual & Installation Instructions

Contents

GE C2S985 Technical Service Manual Manual pdf 54 page image

– 54 –Oven ComponentsOven Burner Ignition SystemThe igniter is a Norton-style, rectangular glowbar. The ignition circuit consists of the electroniccontrol, the igniter, and the gas lockout valve. The 3components are wired in series.The most important points to know about theignition system are:• The igniter resistance decreases as the ignitersurface temperature increases.• The safety valve operates by current, notvoltage.From a cold start, the igniter needs 30–60 seconds,with voltage applied, to reduce the electricalresistance enough to provide a minimum of 2.9amps of current flow in the series circuit. This is therequired current flow needed for the safety valveto open and supply gas to the burner. The glowbar should provide a steady current flow between3.2–3.6 amps flowing in the circuit. The igniterwill remain energized at all times during burneroperation. If the igniter glows red, but does not drawat least 2.9 amps, the fault is usually with the igniter,not the valve. Always check the gas lockout valvefor a locked-out condition.Note: If the igniter glows, but ignition does not occur,make sure the gas lockout valve on the pressureregulator is in the open position.Slow ignition can be caused by one or more of thefollowing conditions:1. Blockage of primary air intake: The hole beneaththe bake orifice hood must be open and free ofinsulation.2. Blockage of secondary air intake holes:Examine the oven burner box (galvanized boxsurrounding oven burner) and inspect thesingle row of secondary holes beneath thebake burner for signs of blockage. Also, be sureitems in the storage drawer do not push againstthe ceiling of the drawer area. If pushed hardenough, the ceiling will flex upward and close offthe secondary air holes.3. Improper alignment of orifice hood and burner:Orifice must be pointing straight into the burnerventuri.4. Improper air/gas adjustment.5. Blockage of burner crossover slots: Crossoverslots must be open and free of burrs.6. Improper installation: Failure to seal all openingsin the wall behind the range and the floor belowthe range may permit substantial drafts, whichcan affect ignition.7. The gas control valve should drawapproximately 3.3 to 3.6 amps when operating.Check by measuring the amperage in L1 to theoven control. This can be done by removing thecontrol panel glass and clock/insert assembly.Glow Bar IgniterWARNING: The igniter glow bar and its protectivecage are 1 assembly on the Norton-style igniter. Theround Carborundum igniter cannot be substitutedfor the rectangular Norton igniter.Note: When testing certain components on Profileand GE models, it is easier to check their resistanceon the ERC by placing the control panel in theservice position. (See Touch Panel and ElectronicRange Control (ERC).) For Café models, if possible,remove the rear cover to check certain component'sresistance. (See Rear Cover.)Check the glow bar circuit with a clamp-onammeter. If the igniter glows red, but the circuit doesnot draw at least 2.9 amps, the fault is likely with theigniter, not the valve.