The first possible cause is the use of a new propane tank that has been improperly filled. New tanks must first be purged of air before being filled with propane. Purging requires that the tank be filled with a small quantity of propane then emptied. The propane being heavier than air will force all the air out of the tank during the emptying and leave only propane vapor in the tank. The tank can then be filled and, when used, the tank will emit only propane vapor. If the tank is not purged, the air in tank will be emitted into the grill first and will either not burn at all or burn with a very low flame. It can take over an hour to vent the air from a non-purged propane tank through a grill's regulator and valve. Always make sure a new propane tank is purged before filling.
The second possible cause is the surge protection device built into the grill's regulator. All Coleman Grills have the surge protection device. This device cuts the flow of fuel to the grill if a sudden increase in propane flow is detected. This is to prevent a large venting of propane if the hose or valve on the grill is damaged. This device is also activated if the burner valves on the grill are in the open position when the valve on the tank is opened. You want to always be sure the burner knobs on the grill are in the off position before shutting off the tank valve when shutting down the grill. Just turning the knobs to the right until they stop may not turn off the burners. Most knobs must be pushed in and turned to the right before they will fully shut off the grill. Always make sure the knobs are in the off position before opening the tank valve when starting the grill. If either one of the knobs are in the open position, the surge protection device will activate and the flow of fuel to the grill will be very low.
The third possible cause is the use of an Overflow Protection Device that is now required on all propane tanks sold in the United States. This device is built into the tank and prevents too much propane from being put into the tank. It involves a float that rises on the liquid propane in the tank and shuts the valve if too much propane is put into the tank. Though this device is primarily used when the tank is being filled, it can also activate if the tank is tipped. Most propane cylinders on grills are stored below the grill body itself on a plate just above the wheels. If the grill is tilted when being moved, the moving liquid propane in the tank can cause the float inside the tank to rise and activate the OPD. This will shut off the flow of propane through the valve.
It is important to note that the firmness of your bed may decrease after you initially inflate it. This is normal and not an indication of leaking. The material is simply stretching after inflation. Add air to your desired firmness. If you believe your bed is still potentially leaking, follow the steps below:
Leak Identification Process:
To identify a leak, fully inflate the bed and listen for any hissing or other sounds that may indicate a leak location. Place your hand parallel to the surface of the airbed approximately 2 inches away and slowly trace the surface of the airbed. Most leaks are found on the top surface, so check the top of the surface first. If the leak is not found, check the side and bottom. If a leak is found, follow the steps below.
Leak repair with liquid sealant for flocked or laminated PVC:
Please note holes larger than 1/2 inches or cuts larger than 1 inch are unlikely to be repaired successfully. Clean the bed with a dry paper towel and then lay the bed flat on the ground. This will help the glue to say in place while it dries. Apply about a dime size of liquid sealant (Seal all) to the bed using a small circular pattern. Wait 4 hours for the glue to cure.
Leak repair with an adhesive patch for smooth PVC:
Please note holes larger than 1/2 inches or cuts larger than 1 inch are unlikely to be repaired successfully. Clean off the bed with a dry paper towel and lay the bed flat on the ground. Cut the repair patch in a circle. Apply to the bed making sure there are no wrinkles. Use your thumb to apply pressure ensuring the patch is completely adhered to the PVC.
Please Note ***** This procedure must be done outside, as the heater will have a high flame while burning the alcohol off. You can also extend the life of your wick assembly by cleaning the wick with carburetor cleaner. Once you disassemble the heater, you need to place the wick in carburetor cleaner and let it soak overnight. Wearing rubber gloves, knead the wick to loosen the old fuel. If the wick is not pliable, it is unlikely that it will pull fuel up to the heater head.