Use and Care Manual
© 2019 Hestan Commercial Corporation
49
EN
SYMPTOM POSSIBLE CAUSE SOLUTION
Range does not operate
(no display, knob lights, 
interior lights, etc.).
Power cord not plugged in, or no power to 
receptacle, or breaker tripped.
Check breaker. Call for service for 
other issues.
Power on but no response 
from display.
Control board needs a reset. Turn off circuit breaker for 5 
seconds to reset. 
Burner will not light.  Gas supply not on / shutoff valve closed.
Power cord not plugged in, or no power to 
receptacle, or breaker tripped.
Burner ports near igniter, or igniter itself is 
obstructed or dirty.
Burner head not installed correctly on base.
Defective or clogged burner valve.
Incorrect orifice or clogged orifice.
Igniter defective (not sparking).
Low gas pressure to unit.
Defective regulator or regulator installed 
improperly.
Check shutoff valve.
Check breaker. Call for service for 
other issues.
Clean burner ports / igniter.
Check burner head installation.
Call for service.
Burner will not stay lit. Burner ports obstructed or dirty.
Vent plugged on regulator or regulator 
installed improperly.
Low gas pressure.
Clean burner ports / igniter.
Call for service.
Burner not working well / 
lazy or yellow flame.
Burner ports are obstructed or dirty.
Poor combustion, air-fuel mixture not 
adjusted properly.
Gas pressure incorrect / incorrect regulator.
Orifice sized incorrectly for gas type.
Clean burner ports / igniter.
Call for service.
Gas Odor. Burner went out or did not light.
Burner head not installed correctly on base. 
Burner ports obstructed or dirty.
Loose or broken gas line.
Ruptured pressure regulator.
Poor combustion, air-fuel mixture not 
adjusted properly.
Relight burner.
Check burner head installation.
Clean burner ports / igniter.
Turn shutoff valve to off position 
and call for service.
Oven Light not working. Power cord not plugged in, or no power to 
receptacle, or breaker tripped.
Bulb is burned out.
Check breaker. Call for service for 
other issues.
Replace bulb.
Oven door will not open. Oven door is latched during self-cleaning 
mode. 
Once oven has reached a safe 
temperature, door will un-latch. 
If door will not un-latch, call for 
service.
Heat escaping from top of 
oven door.
Oven door not sealing correctly. Check/clean oven door gasket. 
Replace if worn.
Fan noise / hot air coming 
from appliance, even when 
off.
Oven cooling down. This is normal. If you DO NOT 
hear the fan running during or after 
using the oven, call for service.
ERR04, ERR05, ERR08 or 
ERR20 code displayed.
Non-critical electronic malfunction. Attempt a reset at the breaker. If 
error code persists, oven can still 
be operated without affected 
feature. Call for service at earliest 
opportunity.
TROUBLESHOOTING GUIDE










