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Bosch gas cooktop

Bosch gas cooktop

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Thread: Bosch gas cooktop

  1. #1
    Join Date
    Jun 2013
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    4

    Default Bosch gas cooktop

    Have a Bosch gas cooktop model NHT 925 AUC, it`s old but new. It`s been converted to LP gas. The problem is the valves do not turn the burner low enough to let something simmer, like soup.Would a valve from a newer Bosch model say NGM 8654 UC with the Optim (400btu) work in the older model?

  2. #2
    Join Date
    Feb 2012
    Location
    Canada
    Posts
    2,348

    Default

    Hi,

    It`s been converted to LP gas. The problem is the valves do not turn the burner low enough to let something simmer, like soup
    LP burns hotter than NG does.
    The valve appear to be different between those two cooktops.
    Are the shafts ( under the knob ) hollow on yours?

    jeff.
    http://www.applianceaid.com/
    Appliance Repair Aid

  3. #3
    Join Date
    Jun 2013
    Posts
    4

    Default

    Hi Jeff, The shafts look to be solid brass. If some re&re needs to be done I`am willing to do it or have it done.Someone said that the valve and burner
    need to be matched up,is that true..ish?

    Thanx ED

  4. #4
    Join Date
    Feb 2012
    Location
    Canada
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    2,348

    Default

    The shafts look to be solid brass
    That's too bad...the hollow ones have a screw that can adjust the flame intesity.

    Someone said that the valve and burner
    need to be matched up,is that true..ish?
    Trueish for sure....valve and orifice allow the gas flow to the burner.

    The problem is the valves do not turn the burner low enough to let something simmer, like soup
    Maybe a smaller orifice can be found....old ones often had the size stamped on them.

    jeff.
    http://www.applianceaid.com/
    Appliance Repair Aid

  5. #5
    Join Date
    Jun 2013
    Posts
    4

    Default

    Hi Jeff, The cook top orifices are marked, medium 74L #18417 and large 98L #18418.

    I also changed out the bypass screws per instructions, have not tried putting the NG back in.
    Not a lot of room to work, and if it drops down inside...well would not be fun.

    Do all orifices for cook tops have the same thread size?

    What size do you think would best help with this problem?

    Thanx Jeff

    ED J
    Last edited by ED J; 06-21-2013 at 09:08 AM.

  6. #6
    Join Date
    Feb 2012
    Location
    Canada
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    2,348

    Default

    Do all orifices for cook tops have the same thread size?
    Probably not all....but many that I see do.

    What size do you think would best help with this problem?
    Not sure if it will help or not, but the newer model# you posted has a 5500 BTU burner, which is the right rear.
    RR is ( no pic ) Holder Manufacturer Number 611994.

    Bosch gas cooktop-p0812039-00002-png

    jeff.
    http://www.applianceaid.com/
    Appliance Repair Aid

  7. #7
    Join Date
    Jun 2013
    Posts
    4

    Default

    Thank-you Jeff for your help. Have a FYI about this cook top.
    The valve in the off position is at 12 o`clock you push down and turn to high at 9 o`clock and 3 0`clock is the low position.
    If you go back to high push down a little and turn towards 12 o`clock the burner goes to a very low burn, and works great.

    Again thank-you Jeff Sometimes procrastination does pay off!!

  8. #8
    Join Date
    Feb 2012
    Location
    Canada
    Posts
    2,348

    Default

    Thankx for the update

    jeff.
    http://www.applianceaid.com/
    Appliance Repair Aid

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