Head out of Spiro on almost any county road and you’ll pass homes with a white propane tank sitting in the side yard. Natural gas lines don’t reach a lot of rural LeFlore County, so propane is how plenty of families heat, cook, and run the water heater. We’re based out here ourselves, and fall brings the same handful of propane questions every year. Propane furnaces work a lot like natural gas furnaces, but the fuel, the tank, and the long drive out add a few things worth knowing before the first hard freeze.
Here are the questions we hear most, with straight answers.
Is a propane furnace different from a natural gas furnace?
Mostly no. The cabinet, blower, ignition, and safety controls are the same. The difference is the gas valve and the burner orifices. Propane is delivered at a different pressure than natural gas, so a furnace has to be set up for the fuel it burns. Many furnaces ship for natural gas and get converted for propane with a manufacturer’s kit during installation.
That’s why you should never move a furnace or a gas appliance from a natural gas house to a propane house, or the other way around, without having it converted and checked. Running the wrong setup can cause poor combustion, sooting, and carbon monoxide.
The tank ran low and now the furnace won’t light. What do I do?
First, get propane delivered. Then, before anything gets relit, the system usually needs a leak check. When a tank runs completely empty, air and moisture can get into the lines, and any appliance pilot or valve left open becomes a safety concern when gas starts flowing again. Most propane suppliers won’t simply refill and leave without checking the system first, and that’s a good thing.
Once the gas supply is back and confirmed tight, the furnace may still need a reset. Air in the line can keep it from lighting on the first few tries, and some furnaces lock out after several failed attempts. If it won’t light after the gas is restored, that’s when to call us.
The best fix is not running out. A lot of folks out here set up automatic delivery or check the gauge on the tank every couple of weeks once cold weather starts. When the needle gets down toward the low end, call for a fill. Don’t wait on it during an ice storm, when the delivery trucks have the same slick roads you do.
I smell gas. What should I do?
Leave the house first. Propane has a rotten-egg odor added so you can smell a leak. Don’t flip light switches, use the phone inside, or start a car in an attached garage. Once you’re outside and away from the house, call your propane supplier or 911. If it’s safe to reach, the shutoff valve on top of the tank can be closed.
After the leak is found and fixed, we can check and relight the furnace and make sure it’s burning clean.
Why does my propane furnace make so much soot or a yellow flame?
A healthy flame is mostly blue. A lazy yellow or orange flame, soot around the burners, or a sharp smell when it runs means it isn’t burning right. Common causes are dirty burners, a gas pressure problem, a blocked vent, or a furnace that was never properly converted for propane. This one needs attention soon. Poor combustion wastes fuel and can produce carbon monoxide.
🛠 What we do: on a propane furnace we check the gas pressure at the furnace against the manufacturer’s setting, look at the flame, clean the burners and flame sensor, inspect the vent and heat exchanger, and test for carbon monoxide. When we’re done, you know it’s set up right for propane and burning the way it should.
Do I need a carbon monoxide detector with propane heat?
Yes. Any home with a fuel-burning furnace, water heater, stove, or fireplace should have working CO detectors near the bedrooms and on every level. They’re inexpensive, and the alarm is the only way to know about a problem you can’t smell. Test them when you change your clocks.
Can a heat pump cut down how much propane I buy?
Often, yes. A setup called dual fuel pairs a heat pump with a propane furnace. The heat pump handles the mild days, which is most of a River Valley winter, and the propane furnace takes over when it gets truly cold. On a lot of rural homes, that means the tank lasts noticeably longer. Today’s heat pumps ship with R-454B refrigerant, and that’s what we install.
Whether it’s worth doing depends on the age of your equipment, your electrical service, and what you’re paying for propane. We’ll tell you honestly if it pencils out for your house.
Is a propane furnace more expensive to service?
The service itself is about the same as a natural gas furnace. The difference for rural customers is usually distance and timing. We’re based right here near Spiro, so a farm or a house at the end of a long gravel drive isn’t out of our way. During office hours we’ll schedule you like anyone else. If you need us after hours, we’ll come out; after-hours work is billed at an overtime rate, and we’ll tell you that rate before we head your way.
When should I have it checked?
Before the first cold snap is ideal, and right after any run-out or leak repair. Fall is when we find the weak ignitor or the dirty burner that would otherwise quit on the coldest night of the year.
Heating Help for Rural Spiro and LeFlore County
Clark HVAC is a family-owned, licensed and insured heating and cooling company based near Spiro, and we service propane and natural gas furnaces, heat pumps, and dual-fuel systems across LeFlore County and the River Valley. If your propane heat isn’t acting right, call. We’ll make the drive, check it properly, and explain what we find in plain English.
📞 Call Now: 918-839-3734
Straight answers. Fair pricing. Clean work.