I have snapped the knob to the oven and the plastic is inside the oven. i anm unable to turn oven on. can i accsess the knobs/fittings on the front panel.

I suggest that if you have more than one knob of the same type, these knobs are usually removable by pulling straight out. Pull the knobs out and compare the inside. I would not be surprised if a metal insert is missing or the inside is stripped. Hope this suggestion is helpful.

You didn't say whether you have a gas or electric oven, or oven & stove. I'll assume you have a stove, just to cover all bases.

First, you should shut down the oven: a gas stove will have a valve on the gas line behind the stove. The valve will either have a red handle or a flat stem that usually has a hole in it. Turn either valve 1/4 turn to shut off gas, use a wrench on the flat stem. An electric stove should be shut off by flipping off the double circuit breaker for it in your electric panel. Do not unplug an electric stove when it is on; this can damage the plug &/or electrocute you.

Most likely the inside of the knob has stripped out. Look at the knob for a hole that has a setscrew in it: a small allen wrench or screwdriver will loosen the setscrew, most knobs don't have them and will pull off. Be careful to use even pressure on two sides of the knob; if you can't pull it off, use two butter knives or flat screw drivers to pry it up enough to get a grip on it.

Look at the center stem on the back of the knob, it will likely be cracked or stripped. Some stems have a D-shaped metal insert that strips out inside the plastic stem. If you have one, pull off a burner knob and compare the stems in the back, if they are the same size, put the burner knob on the shaft for the oven control, and use that knob to turn the oven control off.

If the burner knob won't fit, use your fingers or a pair of pliers (gently) to turn off the oven control shaft. If the shaft stops normally, you can turn the stove back on using either the gas valve or the circuit breaker. If you have a gas stove that doesn't have electric ignition (a clicking noise when you turn on a burner) you may need to re-light the pilots for the burners. Lift the covers off the burners to re-light the pilots.

If you have succeeded in turning off the oven, you need a new knob -- you can get one at an appliance parts store or maybe a hardware store. If the oven control did not turn off normally, I would leave the oven/stove turned off: the control itself will need to be replaced by a qualified repair person.

the knobs only go on one way, you have to line them up then they will push on. if you have an electric range you have to push on the knob before you turn it. failure to push before turning will result in breaking the knob again.

I have a $1.50 per knob solution: 1. Buy a 1/2 x 5/8 x 1 spacer at Lowe's ($1.50 each - get 5 pieces) 2. Clean knobs, remove back cover of knob and connect broken plastic parts with glue (liquid form). Make sure little metal inside the plastic is on front end. 3. Apply glue (gel form) around plastic then slide the metal spacer over. Add more gel glue to fill up space between plastic and metal. Might want to wait 30minutes then apply more glue if there is still space or gap. That's it! I recommend waiting 24 hours to let glue cure until putting it back on range. Now you can put cap back on but would need to make the whole a little wider using a grinder.I used a small flathead screwdriver and a hammer and just chip off small pieces until metal sleeve would fit. However, I think u can do without the cap if you have strong glue. I have pictures. Feel free to contact me for questions: [email protected] My wife is very happy, saved her a lot of money coz new ones cost as much as buying a new range itself! The knobs are very sturdy right now. Wide says it's actually sturider than when we first got the range.

You will need to get a replacement knob for it as either the spring clip or plastic has broken.

I recommend you get a Haynes Repair Manual on your vehicle for the directions on how to remove this properly.

I would advise you to call Kitchenaid Customer Service. They would be able to send you a replacement timer knob at no cost. You may simply pull off the broken timer knob, and the new knob will snap in with ease.

Their toll free telephone number is 1800-541-6390.

Yes, it could be the knob or the oven control.

If the knob fits tightly to the control, and turns the stem of the control, then I would be suspect of the control. But if the knob fits loosely, I would be suspect of the knob.

nothing magical here, sounds like the thermostats on its way out, not servicable part needs replacing.

In less than 6 years of normal use, 4 burner control knobs on my Jenn-Air free standing gas range, Model JGR8875QDS, have either broken or melted.
 
If you want to continue to buy Jenn Air knobs, no problem - several suppliers will be glad to provide them for  $10-15, each (USD). Whirlpool's part number for the factory Jenn Air knobs is 74009148, and you can get them from repairclinic.com (#1035396), or PartsSelect.com (#PS2086597).

If, however, you want to try a different set of knobs, hoping to find some that are less prone to break or melt, then it gets a lot more complicated.

Jenn Air/Whirlpool will be no help; they will tell you the only knob that will work is the Jenn Air OEM knob. Parts suppliers won't help you either - no specifications or interchangeability data exists - and they are unable or unwilling to take measurements.

I can tell you the following 3 knobs will work on your Jenn Air range, model JGR8875QDS. By "work" I mean they will fit your burner controls, operate the burners just like the factory knobs, and the markings on the knobs for "Off" "Lite" and "Hi" will be in the correct positions, similar to the factory knobs. (Exception: The last knob listed has markings somewhat different than the Jenn Air knobs.)

The following knobs do NOT look like your factory knobs - all three are made from black plastic rather than the (fake) silver metal look of the (plastic) OEM knobs. What I cannot tell you is if the following knobs will be more durable than the factory knobs - but then it's hard to imagine how they could be much worse.

-------- Burner control knobs known to work on the Jenn Air JGR8875QDS gas range --------

1. Whirlpool part number 74008850, made for some Amana gas ranges, will fit the Jenn Air. RepairClinic.com calls it part #1035119, and PartsSelect.com calls Item #PS2086316; it sells for $6-7 (USD). You can see a photo by entering the appropriate part number in the search box of either of the two websites mentioned above. The Amana knob is about a quarter-inch larger in diameter than the OEM knobs, but that does not cause any problems. Of the several knobs I tried this is the only one that tells me what it's made from - "PBT" - or polybutylene terephtalate, a thermoplastic which has a melting point of 430 degrees F and a maximum utilization temperature of 330 F.

2. Whirlpool part number 74009094, made for some Maytag gas ranges will also fit the Jenn Air. RepairClinic.com calls it #1035342, and PartsSelect.com calls it #PS2086544. It sells for about $9 on both sites. You can see it here: 
www.repairclinic.com/Appliance-Parts?s=t-74009094-%3d%3d
Like the Amana knob, the Maytag knob is about a quarter-inch larger than the OEM Jenn Air knob.

3. A third knob worth considering is available from AmericanStoveParts.com for $7 each. The front of the knob looks much like their OEM Replica Burner Knob 1104-B (but don't order #1104-B - it won't fit). The knob that will fit the Jenn Air is AmericanStoveParts #1214-025-B. You will have to order it by phone or email because it is not shown on their website. (As of October 2009, none of the knobs shown on AmericanStoveParts.com will fit the Jenn Air.) 

Notice the markings on the 1214-025-B are not quite like the Jenn Air markings, with the "HI" and the "LITE" positions being reversed. Also, the 1214-025-B knob I received did not have the white dot at the "OFF" position nor the white ring around the periphery as shown in the photo of the 1104B knob. The total diameter of the the 1214-025-B is 2" - the same as the factory Jenn Air knobs.

While I don't think the front of 1214-025-B looks quite as nice as the Amana or Maytag knobs, the back of the knob appears to be much more robust than on the others. The extra plastic MAY make this one more durable.