Freezing Regulator and/or Pipework.

A freezing regulator means it has the inability to control the gas pressure coming out of it!  If you notice or experience gas pressure issues immediately turn off and stop using ALL the gas appliances in your vehicle  and turn off the gas bottle or gas tank and seek and experienced LPG gas engineers to look at the cause and carry out any tests to make sure the system and regulator are not damaged and needs replacing.

Regulators can freeze for many reasons, be it from the demand on the regulator being high, the outside temperatures are very low and its a very damp atmosphere ( or a combination of all the above ) or it could be liquid is coming out from the bottle or tank to the regulator.

1) By high demand we mean there is a lot of gas being drawn through the regulator - like when running a high flow gas burner and the outside temperature is damp and cold, then the regulator could freeze. 

2) If the bottle or tank is at the wrong angle e.g. upside down, then instead of vapour gas coming from the outlet tap you could be getting liquid gas (LPG) coming out which will go through the regulator. the liquid LPG will try to change to a vapour in the regulator and thus the regulator will freeze. 

3) If the bottle or tank is over filled then liquid could come out of the outlet tap as well, until the internal snorkel was below the liquid level.  Over filling of a gas bottle or tank can be due to the pump being held in the on position, when in fact the automatic shut off valve is trying to shut the gas off, the pump pressure will slowly overcome the automatic shut off valve in the tank or bottle. This tends to exhibit its self by the display on the pump slowed down compared to the tank was empty - this is classically the user trying to overfill and squeeze as much gas in the tank or bottle as possible. 

On very rare occasions, if the forecourts Autogas pump pressure relief valve is not working correctly, the pumps pressure can be much higher than normal so when the tank or bottle auto shut off valve tries to stop the filling of the tank or bottle, the pressure from the auto gas pump can overcome the tank/bottles shut off valve and fill until the tank / bottle is full.  The thing to look for here is if you know you usually only take 20 ltrs to fill a tank but you end up seeing the Autogas pump display going to 21 ltrs, 22 ltrs, 23 ltrs and so forth when the simple solution is to just stop filling.

If your tank or bottle does get overfilled then the solution your LPG engineer will offer is to safely remove some of the liquid LPG from the bottle or tank for a minute or so.  This will lower the liquid level in the tank so its then down below the pickup pipe or outlet of the bottle/tank and only vapour is present.

A freezing regulator means it has the inability to control the gas pressure coming out of it!  If you notice or experience gas pressure issues immediately turn off and stop using ALL the gas appliances in your vehicle  and turn off the gas bottle or gas tank and seek and experienced LPG gas engineers to look at the cause and carry out any tests to make sure the system and regulator are not damaged and needs replacing.