Kitchen Gas Appliances - Apartment size oven not getting to temp

The only ID info i have on this stove is:
Model:WTM110-4x
Serial:4R10739
Type:37
Sorry, I could not see a brand name. The metal plate was partially painted over. It has electic ignighters and appears that it regulates oven temp by shutting off the burner. It is about 125 deg low at 350 and about 200 low at a setting of 550. any ideas? Thanks for any help.

Does this look close?

Summit WTM110 20 in. Gas Range Pilot Ignition - Yahoo! Shopping (http://shopping.yahoo.com/p:Summit%20WTM110%2020%20in.%20Gas%20Range%20Pilot%20Ignition:2001176965)

Bud

That looks like it, thanks

Hello Nolan and Welcome to the Do It Yourself Web Site and to the Gas Appliances topic.

Could be one or more possible causes. Check for the most likely cause & easiest correction possible, before attempting any repairs or suspecting any parts to be defective.

Anything inside the ovens baking compartment that might cause the heat from the burner not to rise up wards will cause an incorrect temperature.

Examples:
Aluminum foil anywhere inside the oven. If any exists anywhere, remove it all.

An excessively large baking pan, baking dish or such. There must be at least two inches clearance around any baking device inside the oven to allow the heat to rise. Any such restriction to heats ability to naturally rise up-wards will effect the temperature.

The thermostat may be out of calibration. However, if none of the above conditions exists, with a temp that far off of the set temp, very likely the thermostat has lost it's ability to sense and control the temperature.

Only solution in the above condition is to replace the entire thermostat. No amount of calibration is possible when the set temp and the actual temp differ more then 50 degrees.

If the appliance is owned by yourself and NOT in an rental unit you rent, you can replace it. How to instructions can be found HERE (http://forum.doityourself.com/showthread.php?t=159808)

If you rent, advise the owner. Very likely will or may want an appliance service tech to do the job. Any parts like a thermostat etc. purchased by a non appliance service tech over the counter is not warranted nor can it be returned....:eek:

Thanks for the info.
No foil or other obstructions in the oven and i own the apartment and the oven and rent it to tenants. One thing i forgot to mention is that it is a natural gas oven. It has NAT stamped on the ID plate.

If someone previously converted it to an LP oven and then connected it to natural gas how could i tell and would it even ignite? If it could ignite could that cause it to not get up to temp?

I rememeber reading something about supply gas line pressure. Could low pressure contribute to this problem? I know a gas heater was being used at least some of the time the tenants were having problems?

Thanks again
Nolan

i checked it today and it was only about 50 deg low at 350. I adjusted the calibration screw a few times to dail it in and it seems to be holding within +/-15 deg. I am guessing it was a combination of the gas space heater being on high and the calibation being a little off that gave me the larger deviation from the temp setting the first time i check it.
QUESTION:
One thing i was wondering about is that the apartment is around 50ft from the meter. Could this cause an issue with having enough pressure to supply a heater, water heater and oven at the same time?

Hi: Nolan

Distance from meter to house-line and then inside distances of house-line piping, plus gas supply volume, gas pressure and gas demand by appliances are all factors that are not controlled by the end user. The higher the demand may cause reduced flame size but not cause oven temp to be off temp.

What a high demand will cause, is increased time for recovery temps and smaller flame sizes. Not very likely to be a cause of concern based up original problem description. Oven temp being off so far. Nor a cause of concern if no other natural gas appliances have an problems.

Gas pressure and or gas volume from the meter is pre set by the natural gas supplier. Neither is to be changed and or adjusted by the home owner or diy person. Suspect a problem? Call the natural gas supplier and let them deal with their equipment.

Regards and Good Luck.

Thanks for your help and for the DIY website.