Jade JTRH Service Manual page 36

SYMPTOM
Oven burner will not light
(cont.)
Oven pilot outage
Burners not working well
(flame is lazy or yellow)
Convection fan will not
operate
Convection fan operates
only in manual position
Convection motor noisy
SM-36
POSSIBLE CAUSES
Oven burner obstructed or dirty
Oven burner not on orifice correctly
Gas safety valve defective
Thermocouple defective
Pilot orifice obstructed
Low gas pressure or
low gas volume
Drafts/breezes
Orifice too large
Air shutter closed too much
Gas pressure too high
REVIEW COPY 7
Grease, water, or debris in burner
or burner ports are deteriorated
Foil on burner hanger
Door switch failed
Blower AUTO/MANUAL switch
failed
Motor failed
Wire short
Capacitor failed
Door switch failed
Blower AUTO/ON switch failed
Motor mounting is loose
Fan loose on shaft
Motor bearings defective
Motor malfunction
Blower contacting the cover
Titan TM Series Heavy Duty Range
Model Series JTRH, JMRH & JTRHE
REMEDY
Clean all burner ports.
Slide oven burner onto orifice fully.
Replace as needed.
Replace as needed.
Clear all obstructions.
Perform gas pressure check. Adjust as
needed.
Locate/eliminate draft/breeze.
Verify orifice size for gas type and replace.
Perform air shutter adjustment.
Perform gas pressure check.
Clean all burner ports
or replace burners.
Remove foil.
Perform door switch test and replace.
Perform blower switch test and replace.
Perform motor test and replace.
Use wiring diagram to test for shorts in
motor circuit.
Test. Replace capacitor as needed.
Perform door switch test and replace.
Perform blower switch test and replace.
Check bolts on motor mounting and tighten.
Tighten set screws on fan.
Test and replace motor.
Test and replace motor.
Adjust the blower/cover as needed.
Jade Range LLC – A Middleby Company