Tappan gas oven safety valve

[MajorApp]

 The oven safety valve sticks. It will release gas and ignite when you tap on it. Is it possible to repair these. They are expensive and customer can't afford to replace it.

Model 30-2042-00 or 13113-8617220

[AJ]

The gas valves can not be repair.

[JWWebster]

The ignitor is weak and not allowing the gas valve to open. DO NOT REPLACE THE GAS VALVE! Replace the ignitor. The ignitor needs to draw 3.5 amps or it is no good. If you do not have an amp meter a good rule of thumb is to look at it. It should be so bright like the sun it hurts your eyes. If it look like a mellow orange then it is BAD!.

[MajorApp]

 Why does tapping on the valve open it?

[Repair-man]

The inner workings of the gas valve include a warp switch (bi-metal). With a weak ignitor, lower current is produced which may start to curl the bimetal slightly, just not enough to spring it open and let the gas flow. Tapping on the valve body jars the hot bimetal open forcefully, something you want to avoid. Replace the ignitor as JW said.

[MajorApp]

  Thanks for the info guys. Now I understand the workings of that valve. I had the igniter when I went to the house because that was my plan to replace it. I got confused when I could make the oven burner ignite by tapping on the valve. I should have listened to my Uncle Harry.

[RegUS_PatOff]

Since the gas safety valve is about 1 OHM, (and works on about 3.3v) if you could measure the voltage accross the gas valve, that will almost directly equal the amps.

[Repair-man]

FYI, the minimum amp draw to open the gas valve is 2.9 amps. If the amperage is less than that, the ignitor is defective.

[RegUS_PatOff]

Also, it takes about 30 seconds for the Igniter to fully reach it's rated amperage.

[JWWebster]

And it may take 2 or 3 minutes for the gas safety valve to open up. A lot of folks think it should light right up. They never bother to watch the stove while it is working properly.

[Repair-man]

That is wrong information. The oven should take 45-60 seconds to fully light up once the control is turned on. If it takes 2 or more minutes you have a problem, usually the ignitor.

[JWWebster]

I really have not timed it. But I have had customers tell me they turned it on and it did not come on and I have asked them how long they waited ans it was like if we didn't get it lit imediately we shut it back down kinda kneejerk thing. I have sold a lot of ignitors. I have seen folks drop them and say it was that way when I opend the box Hay I even had a guy to call me one day and say it's been 44 minutes and I don't have any ice yet. People freak out. I always say wait 2 or 3 minutes just to make em happy but you are correct ol wise one.

[MajorApp]

 This oven is working again. It WAS the igniter. After getting 2 wrong igniters shipped from the parts store that matched the model # I got the right one that ended up being a universal igniter. The customer waited a few extra days but was happy because his wife wanted a new oven if this one wasn't fixed soon. I noticed that the igniter stays on while the oven is heating and the igniter in a gas dryer turns off while heating. Is that right?

[Repair-man]

The ignitor in a dryer prevents the secondary coil from opening. When the radiant sensor shuts off the ignitor, the current flows thru all 3 valve coils to open the gas valve. The dryer valve uses 120 volts.

The oven uses the ignitor in series with the gas valve, as only 3.3 volts are needed to open this valve. The ignitor must stay energized to keep the valve open.

[MajorApp]

 That must really take a bite out of the igniters life span. Or not?