My pro temp dual propane burner heater will light but won't stay lit

Defective thermocouple. It is the metal tube that stays in the path of the pilot light flame.

This is not going to work in your golf cart. This is propane based heater with a pilot light. It will go out if you drive because of the wind blowing on it. I also believe all Mr. Heaters have a tip hazard turn off. I know the two I have do. If you really want heat in your cart I would recommend an extra battery, an inverter and a porcelain electric heater. Could be made to work very nicely in your cart.

From the Troubleshooting Guide - Check the Obvious Turn on the gas and listen at the burner to see if you can hear the gas arriving.
If the patio heater has an electronic ignition system make sure that there is a spark. If there is a spark but the heater will not light up, try using a lighter or burning spill to light the gas. Be ready for a flash over if you have been trying to light the gas for a while-there might be a small cloud of gas near the burner.

Start at the Bottom The most likely reason that a gas heater will not work is that there is no gas. Take out the empty gas cylinder and replace it with a full one. Often you will feel that there is still gas in an empty cylinder but there is not enough to create the pressure needed to drive the gas burner. An empty cylinder will feel light.

Check the Gas Regulator The gas regulator is the connection of the gas cylinder to the gas pipe that takes the gas up to the burner. Some regulators have a flip switch that prevents the valve in the top of the cylinder from being depressed-effectively an "off" switch. If there is such a switch, make sure that it is in the "on" position.

Check the Gas Pipe Although it is most unlikely that the gas pipe can get blocked, remove the gas pipe from the regulator and from the gas inlet at the top of the heater. This pipe is pressure fitted and held in place by pipe clips. Blow air through the pipe to ensure that it is clear.

Check the Burner The burner will be a very simple assembly. Take each part off in turn and check for any blockages. Also check that the burner apertures are set correctly. Beneath each burner is a small chamber in which air and gas are mixed. Make sure that the gas and air inlets are clear.

If Your Heater has a Pilot Light If your heater has a pilot light, there is the possibility that the thermo couple has failed. The thermo couple is usually shaped like an inverted "v" and sits in the flame of the pilot light. The temperature acts on the thermocouple to keep the gas supply to the burner open. A good indication that the thermocouple has broken down is that the pilot light goes out when you try to turn the heater on. Thermo couples are readily available patio heater parts and usually available from stock.

If you have carried out all the checks and the heater will still not light, you can repeat all the checks more slowly and carefully or take your heater to a specialist for a service.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/steven_7f54ab9063554f66

Try using a match, sometimes spark is not hot enough. be carefulle.

The thermocouple is either too far from the pilot flame or is bad.

The troubleshooting manual says low fuel, low fuel and cold weather and kinked supply line. Beyond this I would need to know if something happened to the unit like it fell over or was taken apart. Best, Joe

It could be dirty nozzle or dirty line
Unscrew every thing in the nozzle and control valve section and clean gas line and reinstall and try it

Sometimes things can get out of sync. Try unplugging the machine for a few hours to rest the code on the board.