Viking VGSC3674GSS Gas Range Oven Very Slow to Heat Up

[raider1234]

I am having a problem with my Viking Gas Range / Oven. It takes 30 minutes to heat up to 200F. It barely gets to 325F after an hour. I took out the U-shaped burner and cleaned out all holes. The ignitor sparks and lights the burner. The burner does stay lit but something is definitely wrong as it should not take this long to heat up. What should I look at next? If it matters, it's LP Gas.

Thank you! 

[hi-Phile]

Does the oven have a broil feature, and does that work?  If it has a broil feature see if you can see flames from the top burner.  Does the lower oven burner show flames?

Also, I read this on another site:

If it's not the ignitor or the burner orifice being clogged, it might be the Direct Spark Ignition module. Other cause might be a faulty thermostat.

 

[raider1234]

Yes, it has a broil feature and it works great. 

The lower burner does show flames I am just not sure if they are "adequate" to get the oven up to the temperature setpoint.

I was going to replace the gas valve next but I figured that I should ask for advice before dropping $250 for the part.

[No excuses]

25 minutes ago, raider1234 said:

Yes, it has a broil feature and it works great. 

The lower burner does show flames I am just not sure if they are "adequate" to get the oven up to the temperature setpoint.

I was going to replace the gas valve next but I figured that I should ask for advice before dropping $250 for the part.

You could have an igniter going bad. Drawing just enough to light, 3.0 -3.1 but not enough to keep a good flame. Measure your amp draw with an amp clamp. You should have a minimum 3.2 amps.

[raider1234]

It's a spark igniter and not a "glow" type one.  Does that matter?

[16345Ed]

Possible dirty burner tube. 

[No excuses]

5 hours ago, raider1234 said:

It's a spark igniter and not a "glow" type one.  Does that matter?

Yes, I was under the impression it is a glow plug type.

[ABA Tech]

There's a service pointer for this. You'll most likely need part #039137-000. It's a rubber boot that goes over the connector part of the spark igniter to keep it from arcing to the cabinet.

In addition to that part you'll need to drill the three vertical holes on the burner tube (the ones closest to the igniter tip) slightly bigger. 1/8" drill bit should do. Make sure to drill upwards so the metal flakes don't fall into the burner tube. You'll also need to bend the bracket holding the igniter so that the tip of the igniter is no further than 1/8"-1/4" from the burner tube. Let us know how it goes.

Edited October 26, 2020 by ABA Tech
Added additional steps

[TGRAppliancerepair]

On 10/26/2020 at 12:40 PM, ABA Tech said:

There's a service pointer for this. You'll most likely need part #039137-000. It's a rubber boot that goes over the connector part of the spark igniter to keep it from arcing to the cabinet.

In addition to that part you'll need to drill the three vertical holes on the burner tube (the ones closest to the igniter tip) slightly bigger. 1/8" drill bit should do. Make sure to drill upwards so the metal flakes don't fall into the burner tube. You'll also need to bend the bracket holding the igniter so that the tip of the igniter is no further than 1/8"-1/4" from the burner tube. Let us know how it goes.

Can you link the service pointer to this thread?