Marshall Air Systems Broiler Troubleshooting
Broilers are the right appliance when you need a crispy and delicious finish to dishes. Keeping your unit operational means knowing what to do when malfunctions happen and parts stop working. Below we will help you with some Marshall Air Systems broiler troubleshooting issues you might run into. We’ll answer the most popular problems and get equipment running sooner.
Why Won’t the Burner Light?
- Pilot isn’t lit - Recycle the on/off button or replace the ignitor.
- Orifice malfunction - Make sure the orifice isn’t plugged.
- Flame runner isn’t fully lit - Clean the flame runner orifice. You can also remove and clean the flame runner.
- Gas valve problem - Have an authorized service agent check that the main gas valve and modulating gas valve are working.
- Pilot jumpers issue - Contact an authorized service agent to ensure that the pilots aren’t plugged.
Why Won’t My Broiler Conveyor Chain Move?
- Jammed conveyor - Remove any objects or items that are blocking the conveyor.
- Blown fuse in control cabinet - Turn the broiler off and replace the fuse as needed.
- Motor shaft isn’t moving - Tighten the sprocket set screw.
- Control circuit fuse blown - Contact an authorized service agent for replacement.
- Motor or control board malfunction - Contact an authorized service agent to help find the issue and replace as needed.
What Do I Do if My Pilot Light Goes Out?
- Loose pilot wires - Check the wire connections by tracing them to where they plug into the gas valve.
- Pilot assembly dirty or bent - Contact an authorized service agent to help clean lines or replace as needed.
- Low gas pressure - Contact an authorized service agent to increase gas pressure.
- Pilot orifice or pilot gas line clogged - Contact an authorized service agent to help with this issue.
- Igniter rod or shield is against the frame wall - Contact an authorized service agent for adjusting the mounting brackets.
How Do I Fix the Main Gas Valve Not Working?
- Gas valve on/off switch turned off - Turn the switch to the on position.
- Failed ignitor - Contact an authorized service agent to replace the ignitor.
- Failed transformer - Contact an authorized service agent for assistance with checking and replacing the transformer.
- Loose connection at gas valve wiring harness - Check that the connector is securely plugged into the gas valve.
- Failed gas valve - Contact an authorized service agent to replace the gas valve.
How Do I Troubleshoot a Burner Backfiring?
- Burner screen failure or burner gasket - Replace as needed.
- Burner over-fired/manifold pressure too high - Contact an authorized service agent for more assistance.
- Loose screws holding burner screen - Check to ensure all screws holding the burner screen in place are secure.
Why are the Cook Times Changing?
- Low gas pressure - Contact an authorized service agent to have them check and adjust the gas pressure.
- Covers and burner shields aren’t in place - Make sure the covers and shields are installed correctly.
- Obstructed holes in upper broiler burner reverberator - Clean the holes and reverberator.
- Clogged burner orifices - Gently clean the burner orifices.
- Air blowing into broiler chamber - Redirect air flow away from broiler chamber.
What Causes Excessive Grease Pan Fires?
- Dirty grease pans - Clean the grease pans.
Why Are Flames Visible at the Exhaust Stack or in the Chamber?
- Low gas pressure - An authorized service technician can help adjust gas pressure.
Why Does the Conveyor Run but Speed is Constant?
- Malfunction in speed module, speed control board or pick up wires - Contact an authorized service agent to repair or replace as needed.
- Motor output voltage malfunction - An authorized service technician will need to check and make any replacements.
- Malfunction in speed module, speed control board or pick up voltage - Contact an authorized service agent to repair or replace as needed.
Why is Repeated Mechanical Binding Happening?
- Conveyor loose - Tighten the tension.
- Chain is backwards - Reinstall the chain correctly.
- Chain links are bent or warped - Straighten or replace any bad links and adjust the sprockets.
- Axle assembly is clogged or greasy - Clean the axle with an axle scraper.
- Axle assembly set collars, bearings, etc. aren’t secure - Reposition the set collars, bearings, etc. Tighten the set collar set screws.
- Axle assembly bushings and bearings worn - An authorized service technician will need to replace or repair these components.
- Motor drive chain assembly not rotating smoothly - Make sure there aren’t bindings or worn components
For more helpful tips on troubleshooting, maintenance and more, check out our library of Marshall Air manuals and diagrams.