I have a gas garland convection oven 10-15 years old. I see the red button to relight the pilot light but I can't find the pilot light itself. Can you tell me where I should be looking?

Probably the pilot light feed is blocked. Clean the jets.

possible the ignition module is malfunction. To test it need to put your meter at the module of PV to ground to see there is 24V reading.
good luck

iT SHOULD TELL YOU ON THE BOX WHERE THE RED BOTTON IS LOCATED. MOST WORK LLIKE THIS. YOU TURN THE DIAL TO PIOLT AND HOLD DOWN THE RED BOTTON AS YOU LIGHT THE POILT CONTENUE TO HOLD BOTTON DOWN FOR ABOUT A MINUTE AND LET GO IF THE POILT STAYS LIT THEN TURN DIAL TO ON. IF POILT DOES NOT STAY LET WAIT FIVE MINUTES AND TRY IT OVER AGAIN FROM BEGINNING

My electric oven, Garland master 200 only reach a maximum of 250* and I only saw 1 of 3 elements turn red

To answer the question fully, I'm gonna need the model number. Pull out the bottom drawer, and the model should be located on the side of the frame or on the drawer itself. Might even be behing the oven at the top, should be a metal plate that flips up.

You will need to replace the igniter

Most commercial ovens have a manually lit pilot. There will be a button somewhere on the range that you will need to push in so gas will come out of the pilot assembly. While holding this button you will the light the pilot and will need to hold the button in for about a minute or two until the pilot stays on after you release the button. Look around the bottom panel,top panel or side panels(you may need to remove one) to find the button. they are usually red and may not look like a button. If you find the button and the pilot does not stay lit then the thermocouple might be bad. If you push the button and do not get any gas coming out of the pilot then there might be debris in the pilot assembly causing the gas not to come out. In that case you could try and tap the assembly or blow with compressed air to clear it. But in most cases you will need to remove the pilot assembly and use a really fine wire(like a metal tie-strap minus the coating) to clear the pilot orfice.

on the gas valve there is an adj. for the pilot size, maybe too small , would try increasing the pilot and see what happens.also the thermocouple might be on the way out ,you might want to replace that and try oper. go with thermocouple first, then try pilot size dont forget to vote tks. monomoy

Relighting Your Furnace's Pilot Light
- Turn off the gas at the main valve at your utility box - Wait five to ten minutes for gas fumes to waft away - Get a long match—yes, a fireplace match, not a standard match - Set the gas valve on your furnace to "pilot" - Press the red button as you hold the match to the pilot valve - Keep pressing the red button for 30-60 seconds so the pilot can heat the thermocouple. Release the button and see if the pilot remains lit - If pilot goes out, wait five to ten minutes and repeat the process - Once the pilot stays lit, turn the main gas valve back on - If the pilot light continues to go out, call a technician, who may need to adjust or replace your thermocouple or adjust your pilot

I would take out the pilot and clean it up and see what happens,also look behind the unit and see if theres a gas regulator on the gas line,if so you will see a nut on it take it off with a pair of pliers and clean as well.that valve is actually the saftey valve,when the pilot lights the flame impinges on the thermocouple and that sends a millivolt back to that valve in order to open.if none of these resolve your problem i would replace the thermocouple first as this is a cheap part and easy to put on.if you need a part # i can give it to you.let me know.