Unigas PBY93 - User Manual

Questions and Answers

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Jackie GibsonAug 13, 2025
Why won't my Unigas PBY93 Burner start?
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  Robert MendezAug 13, 2025
  The Unigas Burner might not start due to several reasons. It could be caused by an open main switch, a line fuse intervention, a max pressure switch fault, a fan thermal cutout intervention, or auxiliary relais fuses intervention. Other potential causes include a control box fault, a servocontrol fault, a smokey flame, an ignition transformer fault, a dirty or wrongly positioned ignition electrode, a dirty nozzle, a defective fuel solenoid valve, a dirty or defective photoresistor, a defective HI-LO flame thermostat, a wrong position of servocontrol cams, fuel pressure being too low, or dirty fuel filters.
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theresacarrilloAug 17, 2025
What to do if my Unigas Burner stops during operation?
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  Stephen ArmstrongAug 17, 2025
  If your Unigas Burner stops during operation, it might be due to a dirty nozzle, a defective fuel solenoid valve, or a photoresistor that is either dirty or defective. Other possible causes include a defective HI-LO flame thermostat or the servocontrol cams being in the wrong position.
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Catherine WatsonAug 20, 2025
Why does my Unigas Burner keep starting and stopping?
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  Rachel EdwardsAug 21, 2025
  If the Unigas Burner starts and stops, it could be due to a control box fault or a dirty nozzle.
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Jordan ThompsonAug 25, 2025
What causes the Unigas PBY93 to stop and repeat the cycle during operation?
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  bruceedwardAug 25, 2025
  The Unigas Burner stopping and repeating the cycle during operation may be due to a control box fault.
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Patrick PittsAug 28, 2025
Why does my Unigas PBY93 repeat pre-purge?
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  Jacob BakerAug 28, 2025
  The Unigas Burner repeating pre-purge is possibly due to a control box fault.
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Emily McmahonSep 1, 2025
What to do if Unigas Burner does not ignite and goes to shut down?
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  ysmithSep 1, 2025
  If the Unigas Burner fails to ignite and shuts down, several issues could be the cause. It could be a faulty control box, circuit enabling thermostat, or ignition transformer, in which case you should replace the faulty component. The ignition electrode might be wrongly positioned, so reposition it. Other possible causes include a dirty nozzle, faulty oil valve, faulty or dirty photoresistor, or a faulty high-low flame thermostat, which would require cleaning or replacement of the respective part. The actuator cam might not be calibrated, so calibrate the actuator cam. Low oil pressure, a dirty oil filter, or a dirty ignition electrode could also be responsible; check and correct the oil pressure, and clean or replace the filter or electrode as needed.
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Diana ArroyoSep 5, 2025
Why does my Unigas Burner start up with cold oil?
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  katelynpriceSep 5, 2025
  If the Unigas Burner starts up with cold oil, it could be due to a faulty oil resistor, in which case you should replace it. Alternatively, the oil enabling thermostat might have tripped; try resetting it.
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Sharon LopezSep 8, 2025
What to do if Unigas Burner goes off and repeats the cycle during operation?
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  Daniel WestSep 8, 2025
  If the Unigas Burner goes off and repeats the cycle during operation, it could be due to a smoky flame. Adjust the operation to reduce the smoky flame.