I have an older GE monogram commercial stove, model zdp48n6rd1ss; 6 burner, double oven. I have rebuilt and refurbished most of the stove but am having a problem with the larger over. If the oven is cold, and you don't open the door, it will come up to temp normally. If you open the door while heating, or after it is heated; it intermittently will not heat further. It stays around 300 degrees (or lower). The thermostat slight comes on if you are trying to go higher than 300; if you lower it, it seems to hold the temp there. My wife has a bakery and uses it at 350-425 most of the time. The smaller oven works fine.
I had an issue with overheating last year ( it was the HWR (high temp relay) last year that we were able to troubleshoot and repair the relay with the help of this forum, thankfully) see here: http://appliancejunk.com/forums/index.php?topic=16557.0#ixzz3oJ3Ra5Fi
The thermostat was replaced last year (I still have the old one; it probably did not need to be replaced) and replaced the bake element (it probably did not need to be replaced either).
Is it the thermostat that I should be looking at, or is there a problem with the HWR. I am thinking with the HWR, it is either on or off, correct? It seems to be an electromagnet. Or should I be looking elsewhere?
Any direction or help would be appreciated.
I have had this stove apart many times while rebuilding it. I have the wiring diagrams and schematics but am not an electrician.
Thanks in advance