Service Bulletins/Info Related To Oven Temps Viking Range M# VGSC4866QSS

[NHTech]

Manufacturer: Viking

Type of Appliance: LP range

Model Number: VGSC4866QSS

Have you validated the model number at an online parts site like Repair Clinic? (yes or no): yes

Have you watched the video on how to search for manuals and have you searched the Downloads section prior to posting this request? (yes or no): yes

I see the service manual on here, looking for any and all info on oven temps being off.

[Samurai Appliance Repair Man]

Found this one on a new burner for added ports, maybe to address failed ignition problems. 

 

[NHTech]

2 hours ago, Samurai Appliance Repair Man said:

Found this one on a new burner for added ports, maybe to address failed ignition problems. 

 

Thanks for that, unfortunately the main problem is the oven is consistently 100-150 degrees too hot. Completely stumped.

[Terry Carmen]

On 4/18/2024 at 10:29 AM, Samurai Appliance Repair Man said:

Found this one on a new burner for added ports, maybe to address failed ignition problems. 

The new burner fixes a problem they had where only part of the "U" shaped burner would ignite.

On 4/18/2024 at 12:48 PM, NHTech said:

Thanks for that, unfortunately the main problem is the oven is consistently 100-150 degrees too hot. Completely stumped.

From the parts diagram, it looks like it uses a mechanical thermostat, so if you're sure it's a lot too hot, about all you can do is replace the thermostat. Or if you're adventurous, try calibrating it. 

PS. Make sure the knob isn't damaged or loose. I think it had a metal insert that would sometimes come out.

 

Edited May 9 by Terry Carmen

[NHTech]

38 minutes ago, Terry Carmen said:

The new burner fixes a problem they had here only part of the "U" shaped burner would ignite.

From the parts diagram, it looks like it uses a mechanical thermostat, so if you're sure it's a lot too hot, about all you can do is replace the thermostat. Or if you're adventurous, try calibrating it. 

PS. Make sure the knob isn't damaged or loose. I think it had a metal insert that would sometimes come out.

 

Thanks Terry! Yeah, so I did indeed install a new thermostat but the problem remains, very strange... No issues with the knob. And I have the opposite issue in the left hand oven- temps are about 50-100 degrees too cold. I also changed the thermostat in that one and the issue is the same...

Are these t-stats able to be calibrated?

[Terry Carmen]

30 minutes ago, NHTech said:

Are these t-stats able to be calibrated?

I think so. It' been a long time.

There might be an adjustment screw down the center of  the knob shaft below some paint you need to scrape off, but if you recently replaced it, I'd be inclined to order another one and send it  back under warranty. It's off by a lot.

Sorry I'm not more help. I haven't had to calibrate  thermostat in a really long time.

 

[NHTech]

1 hour ago, Terry Carmen said:

I think so. It' been a long time.

There might be an adjustment screw down the center of  the knob shaft below some paint you need to scrape off, but if you recently replaced it, I'd be inclined to order another one and send it  back under warranty. It's off by a lot.

Sorry I'm not more help. I haven't had to calibrate  thermostat in a really long time.

 

No sweat! Yeah, it's just so odd, I thought for sure it was going to be a homerun installing the new t-stats but they didn't do anything, feel like I'm losing my mind, ha.

[Terry Carmen]

2 hours ago, NHTech said:

new t-stats but they didn't do anything, feel like I'm losing my mind, ha.

Are the bulb mounting clips all there and not missing/bent? If the sensor bulb isn't where it belongs, it will act weird.

Also make sure the flame spreader on the underside of the oven bottom (top of the burner?) is there and not warped.

I think I'm out of ideas now. 8-)

[NHTech]

12 hours ago, Terry Carmen said:

Are the bulb mounting clips all there and not missing/bent? If the sensor bulb isn't where it belongs, it will act weird.

Also make sure the flame spreader on the underside of the oven bottom (top of the burner?) is there and not warped.

I think I'm out of ideas now. 8-)

Yep, all clips there and in working order. I replaced both of the oven bottoms as well because the welds had come undone on the flame spreaders and they were just sitting on the burners.

Thanks for the ideas!

[Terry Carmen]

34 minutes ago, NHTech said:

Yep, all clips there and in working order. I replaced both of the oven bottoms as well because the welds had come undone on the flame spreaders and they were just sitting on the burners.

That's too bad, because now I have no ideas. 8-)

[NHTech]

On 4/18/2024 at 3:46 PM, Terry Carmen said:

I think so. It' been a long time.

There might be an adjustment screw down the center of  the knob shaft below some paint you need to scrape off, but if you recently replaced it, I'd be inclined to order another one and send it  back under warranty. It's off by a lot.

Sorry I'm not more help. I haven't had to calibrate  thermostat in a really long time.

 

Thank you for this tidbit Terry! There's a bit of silicone that you have to scrape out but there is indeed an adjustment screw. You can seemingly only get one temp precise and everything else is off by 25-35 degrees, but that's way better than 100-200 degrees off.