As a heating and home safety expert, I have been dealing with a wide range of issues related to home heating systems, including propane furnaces. Running out of propane in your furnace can lead to a series of problems that need to be addressed promptly to ensure the safety and efficiency of your heating system. Let me elaborate on what could happen and what steps you should take to prevent or mitigate these issues.

**Firstly, the immediate concern is the lack of heat.** When your propane supply is depleted, your furnace will stop producing heat. This can be particularly problematic during the winter months when the temperature outside is low, and you rely on your furnace to maintain a comfortable living environment.

Secondly, there is a risk of a gas leak. If an appliance valve or a gas line is left open when the propane supply runs out, a leak could occur when the system is recharged with propane. This is a serious safety hazard as propane leaks can lead to fires or explosions if they come into contact with an ignition source.

**Thirdly, air and moisture can get into the system.** When a storage tank is empty or depleted, it can allow air and moisture to enter. This can lead to rust build-up inside the tank, which can damage the tank and the components of the furnace over time.

**Fourthly, there is a potential for contamination of the propane system.** If air and moisture enter the system, it can cause the propane to become contaminated. This can lead to poor performance of the furnace and may require professional cleaning or maintenance.

**Fifthly, the pressure in the system can drop.** A drop in pressure can affect the operation of the furnace. The furnace may not ignite properly, or it may run inefficiently, leading to higher energy costs and potential damage to the furnace.

**Lastly, there is a risk of damage to the furnace components.** Running out of propane can cause the furnace to cycle on and off, which can put stress on the components and lead to premature wear and tear.

To prevent these issues, it is important to monitor your propane levels regularly and ensure that you have a sufficient supply to meet your heating needs. If you do run out of propane, make sure to:


1. Turn off the gas supply to prevent any potential leaks.

2. Inspect the system for any signs of air or moisture intrusion.

3. Check the pressure in the system to ensure it is within the proper range.
4. **Clean or replace any contaminated propane** if necessary.
5. **Have a professional inspect and service the furnace** if there are any signs of damage or if you are unsure about the condition of your system.

By taking these steps, you can help to ensure the safety and efficiency of your propane furnace and prevent the problems associated with running out of propane.

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DON'T RUN OUT OF GAS. ... If an appliance valve or a gas line is left open when the propane supply runs out, a leak could occur when the system is recharged with propane. Air and moisture could get into an empty or depleted storage tank, which can cause rust build-up inside the tank.read more >>