Gas was turned off while I was out of town for summer. Gas Co. turned gas back on but top burners won't light up.

Igniter could still be faulty(not hot enough) or burner control valve
faulty. press the helpful button and check link videos below
Gas Stove Top Burners Not Lighting Not Working

Gas Stove Ignitor and Burner Not Lighting

Daddy Chores Gas range won ignite How to fix it

Actually, it's a gas pressure issue. But, it's fairly easy to solve. First, you need to be sure that your LP Tank has a sufficient amount of gas. If it does, turn the propane tank valve OFF. Disconnect the hose from the tank and wait 5 minutes. Then reconnect the hose to the tank and turn the valve ON VERY, VERY SLOWLY (Slow motion, slow). Once the valve is fully open, light the burner as you normally do and turn the burner flames to HIGH. Has the burner flame returned to normal? If so, you solved the problem. Just remember to always turn the tank valve ON very, very slowly.

If it didn't solve the problem, you will need to replace the heater's hose/regulator assembly. Generally, i's the same type that a gas grill uses. So, it won't be hard to find one.

Hope this helped to troubleshoot and solve your problem. Please let me know.

This may sound silly but is the main gas valve on. Switch on top of the valve generally, turn it from pilot to ON.

call aservice tech your pilot light might be blocked therefore the pilot flame might not be strong enough to handle the puff of gas when the gas valve opens ps. if the unit is off in the summer spiders are usually the problem. Hope this helps

You could have the gas co to check to preassures at or before the unit. Too low or high a preassure and the gas valve cant regulate the proper flow>>Natural gas to the house needs at least 5"-wc psi ---to the gas valve needs 7.5"--wc and while its calling for heat the orrifice needs 3.5" -wc psi! Propane needs 11" wc psi to the valve on the unit and 11' -wc psi to the inside furnace.

In general lets be clear. The OVEN pilot is located under the oven door at the top of the Broiler.It is a small piece of metal just before the GAS safety Valve which acts on temperature so gas won't flow unless Pilot is lit,That's the OVEN PILOT.The stove's RANGE is the top burners where you heat Pots and Pans.It has either 2 Pilot lights that connect the burners to the Flame they are under the Range Top.Newer Models use electronic ignitions no flame.Please note if you had your stove/oven disconected or Gas off when you turn it back on there will be air in the line that needs to escape before you light.This is why in NYC when Utility Co.works on steet main the MUST re-light your appliances.Be Careful with Gas.Good Luck.

Follow manufacturer's recommendation in resetting the excess flow safety device....(Turn burners and LP cylinder off...Disconnect regulator on cylinder. Turn both knobs to high for at least one minute...Then turn them to off...reconnect the regulator to the LP tank...Turn LP valve VERY slowly (30 seconds) until fully opened..then start the grill in the usual manner. ALWAYS TURN THE LP TANK OFF WHEN DONE USING THE GRILL....

I would change the thermocouple and here is why:

The thermocouple is the pilot's, well, co-pilot! It is the electronic device that senses if the pilot flame is hot enough to sustain burning the gas fuel from the burner. If the thermocouple thinks it's safe, then it keeps open the main gas valve located in the pilot assembly. If the thermocouple does not sense enough heat from the pilot flame (such as when the pilot is out), then the thermocouple shuts off the gas valve to the burners.
How the Thermocouple Works
So what is this thing and how does it work? Well the thermocouple (technically called a thermocouple junction) is a device that contains two metal wires welded at the ends and placed inside a protective metal case. The thermocouple sensor is found at the business end of the pilot flame and is designed to be placed in the hottest part of the flame. The other end is connected to the pilot valve body. As the thermocouple heats up, it produces a small amount of electricity and when it gets hot enough from the pilot, send a signal to open the gas valve by using a solenoid operated by a 24 volt transformer. The thermocouple calls the shots, and by converting heat to an electrical signal, it allows the gas valve to open or close. Once the gas valve is open, gas is then constantly supplied to the pilot and as required for the gas burners (as called for by the thermostat). If the pilot goes out, then the thermocouple gets cold and produces no electric signal to open the gas valve's solenoid and the gas valve shuts off the gas supply to the pilot and burners

If your top burners are not lighting or will not work, it is possible that the burners have become dirty or wet. Please follow the troubleshooting directions below before calling service:

1. Turn you burner to the Lite position:
   
   If you hear clicking or sparking, go to Step 2.
   
   If you do not, check your circuit breakers. If the circuit breaker is ok, we recommend that you schedule service by calling 1-800-432-2737 or schedule service online.
   
   
2. Clean the burner and electrode:
   
   First remove the burner grate, cap, and head. Use a needle or paper clip to poke through the holes on the burner head. Re-assemble and try the burner.
   
   Remove the burner grate, cap, and head. Even if it looks clean, wipe the tip of the electrode with a clean, dry paper towel and PRESS IT DOWN. Re-assemble and try the burner, again.
   
   Check to see if the burner works, If not, then go to Step 3.
   
   
3. Re-assemble - Make sure that each burner top matches its burner bottom. The burner top will lay flat if put on correctly.
   
   Check to see if the burner works, If not, then go to Step 4.
   
   
4. The spark igniter is operating properly, but the burner is still not lighting. At this point, we would recommend that you schedule service by calling 1-800-432-2737 or schedule service online.
   

this sounds like an ignitor problem to me. You could replace the ignitor or you could light with a match. Most of these grills have an access point usually on the right side to light the burners with a match just make sure you light the match first and hold it into the access point before you turn the gas on.