Tip & How-To about Ovens

Propane, LP, or Natural Gas Regulator Problems

There are many questions involving problems with gas regulators. Most any gas fired appliances will have a regulator somewhere in the system to regulate the gas pressure to the appliance. On natural gas the pressure regulator is often outside, but many stoves and ranges still have a pressure regulator at the inlet also.

On LP or Propane appliances there is a pressure regulator at the source but then also at the appliance. On outdoor grills the regulator is the silver round thing at the tank.
They often look like this.




The function of the pressure regulator is to keep the gas pressure even so that the flame does not vary much when the usage is increased or decreased. The regulator does this by using a small spring and diaphragm assembly. The counteracting pressures work to keep the pressure even. The regulator fails when it gets stuck. They are designed intentionally to fail in the safest mode or in a low pressure state rather then a high pressure. Therefore many problems involve not enough gas rather then too much.

On outdoor gas grills the regulator can sometimes get stuck if the tank valve is opened too rapidly. Or it will just become stiff from the outdoor environment. If the regulator is not letting enough gas through, try shutting the valve and then opening it again slowly. This will help sometimes. If that does not help and the valve is sticking, do not try to adjust the regulator. Replace it with a new one. Trying to adjust it could cause serious safety hazards. I have seen some web sites telling people to adjust the regulator by watching the flame…this can be a good way to get yourself and others hurt.

If you have a range, stove, or oven that is not working right because the flame varies as you turn burners on and off or when the oven goes on, then the regulator is at fault. Once again, do not try to adjust this to make it work, replace it and get it adjusted with the proper instruments to make sure that the gas pressure is right for the appliance.

Pressure regulators come in many shapes and sizes. They can look like any one of these here.


Gas appliances work at extremely low gas pressure. Natural gas appliances often run at 4” Water Column. Lp or Propane at around 10” WC. That means that the pressure of the gas will only raise the water in a tube 4” or 10 “. That is NOT much pressure and you can get that much by gently blowing in a tube.

So, if you are having trouble with not getting enough heat or the flame running very low, the pressure regulator should be one of the first places that you look.

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I have a Regency Trend Gas Wall oven. The Grill part is working but the oven part has stopped. My guess the gas element is blocked. Is there anyone in NZ that is able to repair or refurbish it?


as it is a gas appliance any accredited gas service person will be able to diagnose the problem and repair it
most problems with gas appliances can be attributed to blocked jets , faulty regulators or control units
find a retailer that sells gas appliances and ask who they recommend for the fitting and servicing of gas units

May 31, 2016 | Ovens

1 Answer

how do i change from lp gas to natural gas on wall oven


First thing you will need to do is find out from the manufacturer of the oven if there is a conversion kit available and if the appliance is convertable. If there is then you can order the kit and follow the installation instructions. Also check the back of the oven for an envelope that may contain the gas orfice replacement heads to convert the appliance to natural gas. If you find the replacement orfice then you will need to remove the lp orfice from the burner and install the natural one. Then the appliance gas regulator will need to have the pressure adjusted lower for natural gas. There is usually a removable cap on top of the regulator on the oven. When you remove this cap there is usually a small metal ring that you can remove and flip over. It will say "nat" on one side and "lp" on the other. You will need to turn this ring over and re-insert so it displays "nat". This will change the gas pressure from 13 inches W.C. to 4 inches W.C. Some appliances only require the orfice change and no regulator adjustment but make sure that is the case with your oven because if you feed 13 inches W.C. pressure to a burner with a natural gas orfice...YOU WILL GET A HUGE BURNER FLAME AND MAY BURN/FLASH YOURSELF...So use extreme caution when converting a gas appliance. And if the oven has a pilot you will need to adjust the pilot pressure or change it's orfice if it has one. If it is electronic ignition no adjustment to that will be needed. Also unplug the electrical power the the unit while working on it.

Oct 11, 2009 | Ovens

2 Answers

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Check the hot surface ignitor if its not working valve will not open, It is located at the back bottom of oven. Sometimes they will appear to be work but if there isnt enough back emf the valve will not open.

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HI thanks for your question. there is a oven sensor , located in the oven, top left corner. replace this part. thanks the appliance doc. please rate my answer. thanks

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