Dcs oven takes to long to preheat It used to take only around 10-20 minutes to preheat but now it takes an hour or two to preheat

Hi friend, thank you for your post!

I know from your post that your Frigidaire oven is working but the preheat takes 30 minutes. This does sound like lengthy amount of time for preheat to be completed. From what you are describing it could be an issue with the panel, element, or thermostat. Since it could be anyone of these underlying issues I would recommend having a professional come out to diagnose your refrigerator to determine the root cause to reduce the risk of unnecessary parts. -Matt

Many of the Pizza ovens require ceramic plates that line the bottom surface of each oven. These ceramic plates absorb the heat and retain the temperature. I never used our ovens with a bare lower surface, always applied the plates for even heat and distribution.

if the oven has a glow bar it,s not staying hot enough to keep the main burner on change the glow bar

check to see if both broil and bake elements/gas works

More than likely, its your oven thermometer thats taking a half hour to read correctly. The oven is probably getting there sooner. If you had a digital thermometer, the read would come quicker. So save your money,nothing wrong with your stove.

Control board failure due to a power surge. Replacment boards are around $180 and come with a surge protector board.

http://www.applianceaid.com/nuker.html
click the link  Oven temp sensors sense the temperature is the oven cavity and the temp sensor changes resistance, this change in ohm resistance tells the oven control what temperature the oven cavity at and tells the control to shut off the element or turn it back on. The most common temp sensors used today ( *not all ) are approx 1000-1100 ohm resistance at room temperature ( 70�F )
Some ohm readings and there temperature:
Degrees F    -   Resistance
            100 - 1143 ohms
             200 - 1350 ohms
             300 - 1553 ohms
             350 - 1654 ohms
             400 - 1753 ohms
            500 - 1949 ohms


click this link
http://www.applianceaid.com/elecrange.html

Hello , sounds like the electronic ignitor has went out , they are not difficult to replace if your willing , the part is around fifty dollars and it should only take about a half hour to replace. please let me know if you have any other questions.

Phil

most ovens take 15-25 min to preheat.

Had the same problem last week - called DCS (which automatically transferred me to Fischer-Paykel) and was able to order the part from them.  They knew exactly what it was, and shipped to me in CA from CA, it was less than $90.  Just installed it, and the new one works swell.  One suggestion - I drew with a Sharpie on one side of each of the three parts that plug into the board to help align the new one, and to install the wide ribbon cable (not really a cable, but you'll know what I mean), pull up on the two side pieces and the ribbon pulls right out.  Keep it up and slide the new one in and then push the black piece down.  That was the only part that took me a minute to figure out.