Regulator freezes up and shuts the heater down.

It is possible that the problem with your All Pro SPC 150T propane heater could be caused by a faulty gas regulator or pressure switch. The gas regulator controls the flow of propane while the pressure switch controls the temperature of the heater. You may need to replace the gas regulator or pressure switch in order to get your heater running again. Additionally, you could also check for any loose connections or clogs in the fuel line.

Are the propane tanks fitted with a pressure regulator?

The propane gas regulator is one of the most important parts of a propane gas system (or a compressed natural gas system as well).

The purpose of the regulator is to control the flow of gas and lower the pressure from the tank to the appliance(s) in the gas system.

The regulator not only acts as a control regarding the flow and distribution of propane (or CNS) but also as a safety barrier between the high pressure of the tank and the end use appliance(s).

Without it, you can cause serious damage to the appliance's gas valve and create a disaster- fire or explosion.

The regulator covered with frost is the problem. It freezes the gas and the gas line up. But, usually this only occurs when it has been exposed to subfreezing (in the teens) temperature for a long period of time. The quick fix, is to soak a bath towel in hot water, ring it out and quickly wrap it around the regulator. Once it thaws, the gas will start flowing again and you can light the burner. Generally, once it's flowing and being used, it won't freeze up again, right a way. Most propane companies add ethanol to the propane in the winter, to help keep it from freezing in the lines and the regulator.

Hope this helped answer you question and provided, at least a quick fix solution.

it sounds like a bad thermal coupling to me and the propane freeze up is normal propane is natuarly cold.

I'm not sure about that model, but I think you have to hold that button down for a minute or more to "prime" it.

I have a different model coleman propane heater that sits on the 20# tank. Mine is probably getting rusty, last time I used it I had to hold that button down for a long time.

I'm looking for a new heater now myself, as mine won't stay lit outdoors in much wind.

1. Are you using a portable LP cylinder? LP Regulators freeze up when the liquid part is the propane is flowing through the regulator this is caused by an overfilling of the propane tank.
2. If the BTU capacity of the regulator is not high enough to cover the BTUs of your grill, the regulator is working too hard and potentially pulling liquid (not vapor as it should)

I would suggest calculating the BTUs of your grill and looking to see what the capacity of the regulator you are using.

You can also read this about regulators LP Gas Regulators 101

Could be a regulator fault, thermostat, flow switch (pump) or ignition fault get unit serviced by a competent gasfitter

yes you need to replace the regulator it sounds as if the vent is plugged.

Hope this helps

Reddy suggests: 1. Propane supply may be inadequate 2. High surrounding air temperature causing thermal limit device to shut down heater 3. Restricted air flow 4. Damaged fan 5. Excessive dust or debris in surrounding area solutions are: 1. A) Refill tank B) Provide additional and/or larger tanks. 2. This can happen when running heater in temperatures above 85° F (29° C). Run heater in cooler temperatures 3. Check heater inlet and outlet. Remove any obstructions 4. Replace fan. 5. Clean heater. could not get manual for your exact model but if you want manual for RLP 125 then; http://12.153.20.74/manuals/113893-01C.PDF appears to be the same beast. Hope helps :)