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Thread: Old Tappan oven won't light

  1. #1
    Join Date
    Dec 2011
    Location
    milton, wv
    Posts
    7

    Default Old Tappan oven won't light

    Model Number: CWKV 1885
    Brand: Tappan
    Age: More than 10 years

    Hi,
    >>
    We recently put in a vintage 1956-’57? Tappan Holiday oven.
    >>
    Model # CWKV 1885
    Serial Number 94360
    >>
    It is in great shape overall, all the top burners and the broiler work perfect, but the oven won’t light. It is an 885 Series with a constant burning pilot light. The pilot light burns easily, but the oven burner won’t come on. The pilot light appears to be coming out of a small metal block that has a small gas tube and what appears to be a thermocouple going to it. The end of it where the flame is looks like the head of a nail.
    >>
    I have a reprint of an old manual. In part it says the following to relight oven;
    >>
    · Relight the pilot.
    · After pilot burns for 45-60 seconds……push in red button on safety valve and release.
    · Turn Oven Heat Control (thermostat) wide open, past 550 degrees.
    · Turn Selector Valve to word “Oven”.
    · When oven burner lights, turn Heat Control knob to desired temperature.
    >>
    Have tried these steps to no avail.
    >>
    Anybody help with this?
    >>
    Thanks!
    >>
    >>

  2. #2
    Join Date
    Jul 2006
    Location
    Murray, Utah, United States
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    Default

    First turn selector to oven then hold the red button in on the valve and light the pilot, wait for about a minute then release the red button. If the pilot goes out try again until it stays on. Turn thermostat on. If that doesn't work post a few pictures and I'll be able to give you better instructions.
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  3. #3
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    Dec 2011
    Location
    milton, wv
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    Default

    The pilot burns fine; it stays on. According to the directions, you press the red button on the valve after the pilot is lit.

  4. #4
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    Default

    Quote Originally Posted by tappan greg View Post
    . According to the directions,
    Post it here and let's take a look
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  5. #5
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    milton, wv
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    Default

    will try
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  6. #6
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    There's a thermocouple by the pilot light going to the safety valve with the red button.The pilot light must have a good flame to get it hot enough. When it gets hot enough it should hold the valve open when you push the red button to let the gas flow to the selector valve. When you set it to oven it will flow to the thermostat. Leave the selector on oven. Disconnect the gas line where it connects to the selector valve from the safety valve. Push the red button and see if you get any gas to come out of the line you just disconnected. If not, release the red button and if you think the pilot light might not be big enough, try heating the end of the thermocouple with a hotter source like a lighter or even a propane torch. Just don't hold it on there very long. A couple seconds is long enough. See if you get gas flow when you push the red button again if you do, remove the heat source from the thermocouple. If the gas shuts off after a couple seconds try to adjust the pilot light bigger first. if that doesn't work the thermocouple is bad. If it shuts off right away the safety valve is bad. I don't remember if the thermocouple is replaceable on that style but you can try removing the thermal couple from the safety valve and clean the end with a wire brush and make sure it's a tight connection.
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  7. #7
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    I was just re-reading your first post. If that range has a separate broil manifold that comes from the thermostat, the thermocouple and safety valve are probably OK and the thermostat might be the problem. It's been a while since I worked on one of those and I just can't remember the gas line set up for the manifolds. If there is two gas line out connections on the selector valve, one going to the manifold for broil and the other one going to the thermostat for bake, instead of disconnecting the gas line from the selector valve from the safety valve, disconnect it from where it goes to the thermostat and see if it comes out there.
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  8. #8
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    The temperature control, (250-550 degree knob), has one line going to the selector control and one to the safety valve.

    The selector control has the line going to the temp control, one that goes out behind the oven and one small tube that goes to a round diaphram looking thing and tees off with the line going out the back of the oven. (Can't remember where those last two lines are going and the oven is a pain to get back out).

    There is a seperate fitting between the two controls that has two small tubes that tee off. One goes out the back and one exits to the left.

    Hope that helps.

    Thanks

  9. #9
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    Quote Originally Posted by tappan greg View Post
    The selector control has the line going to the temp control,
    Bake Manifold

    Quote Originally Posted by tappan greg View Post
    one that goes out behind the oven
    Broil Manifold

    Quote Originally Posted by tappan greg View Post
    and one small tube that goes to a round diaphram looking thing and tees off with the line going out the back of the oven
    Bake pilot light and Broil pilot light

    Quote Originally Posted by tappan greg View Post
    There is a seperate fitting between the two controls that has two small tubes that tee off. One goes out the back and one exits to the left.
    Surface unit right and left side pilot lights

    Quote Originally Posted by tappan greg View Post
    The temperature control has one line going to the safety valve.
    OK, this line is for a secondary pilot light and most likely the cause of the oven not turning on. When the thermostat is turned on it kicks the pilot flame down on the thermocouple. The good news is it's easy to check. Follow your instructions for lighting the oven. Then take your Bic lighter and hold it over the end of the thermocouple. The oven will turn on. The bad news is you'll never find that thermostat but you might find a place that rebuilds them.
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  10. #10
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    I think I am following you and tried lighting it as instructed, but no luck. Heres what I am not understanding; the pilot light is ready to go as soon as gas is turned on. It lights right off. I then follow the instrucions per the manual. Where are you saying to put the Bic lighter? The pilot is already burning at the end of the pilot/thermocouple unit. I tried applying heat around the rest of the unit to no avail.

    Also, what is the purpose of pressing the red button after the pilot light is going, (per instruction manual). I guess this just an older design and they did things different then???

    Interestingly, the broiler uses a Bryant electric ignitor instead of the "live" gas pilots on the rest of the stove. It works perfect.

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