Disclosure: As an Amazon Associate we earn from qualifying purchases. We may earn a commission if you buy through our links, at no extra cost to you.
The short answer: Most patio heater problems come from a few common culprits: dead batteries in the igniter, a blocked gas hose or burner, a faulty thermocouple, or wind blowing out the flame. You can often fix these yourself with basic tools and a bit of patience. Let’s walk through each issue step by step.
If you press the ignition button and hear nothing, the first thing to check is the battery. Most patio heaters use a AA or AAA battery in the igniter unit. Remove the battery and test it with a multimeter or just replace it with a fresh one. Also, check the electrode wire that runs from the igniter to the burner. It might be loose or corroded. Clean the electrode tip with fine sandpaper and ensure the gap to the burner is about 1/8 inch. If you still get no spark, the igniter unit itself may be faulty, and replacement igniters are inexpensive and easy to install.
When the heater ignites but then goes out or burns weakly, it’s often a gas supply problem. Start by confirming the propane tank is not empty. If you have a full tank, check the gas hose for kinks or leaks. You can test for leaks by applying a soapy water solution to the connections and looking for bubbles. Next, the regulator might be stuck or failing. Many regulators have a safety feature that shuts off gas if the flow is too high. Reset it by turning off the gas valve, disconnecting the hose, and then reconnecting it slowly while turning on the valve. If the flame is yellow and lazy, you may have a spider or debris blocking the burner or orifice. Clean the burner and orifice with a small wire brush or compressed air.
If the heater turns on but the flame goes out as soon as you release the control knob, the thermocouple is not sensing the heat. The thermocouple is a small copper rod near the pilot light. It generates a small voltage when heated, which keeps the gas valve open. If it’s dirty or misaligned, it won’t work. Clean it with fine sandpaper and make sure it sits directly in the pilot flame. If it’s damaged, you’ll need to replace it. This is a common fix and parts are available online or at hardware stores.
Even a properly working patio heater can be defeated by a gust of wind. The flame can be blown out, and the thermocouple cools down, shutting off the gas. This is a safety feature, but it’s annoying. Many heaters come with a wind guard or you can purchase a patio heater wind shield. If you’re in a breezy area, position the heater behind a barrier or use a model with a lower profile. Also, never use the heater in an enclosed space, as this can cause dangerous carbon monoxide buildup.
Regular cleaning prevents many problems. At the start of the season, remove any cobwebs, dust, or debris from the burner and reflector. Check the hose for cracks or wear. Tighten all connections. If your heater uses a pilot light, clean it with a pin to ensure a steady flame. Keeping the burner ports free of blockages ensures even heat distribution. Also, inspect the wheels and base for stability, as a tipped-over heater can cause injury or fire.
If you’ve gone through these steps and the heater still doesn’t work, it might be time to call a professional. Particularly if you smell gas or suspect a leak, stop using the heater immediately and contact your gas supplier or a certified technician. Also, if the heater is old and parts are hard to find, it might be more cost-effective to replace it. When shopping for a new patio heater, look for one with a good warranty and easy-to-find parts. For a comprehensive comparison of reliable models, check out our best patio heaters guide.
Before you buy a patio heater, consider the size of the area you need to warm and the layout of your outdoor space. Patio heaters are typically rated by their heat output, measured in British thermal units (BTUs). A standard full-size propane heater produces around 40,000 to 46,000 BTUs, which can effectively warm a circle with a diameter of roughly 15 to 20 feet in calm conditions. If your patio is larger or oddly shaped, you may need more than one heater or a model with a higher output. For smaller balconies or tightly packed seating areas, a tabletop or mini heater with lower BTU output may be sufficient and safer, as it takes up less space and reduces the risk of accidental contact.
Beyond size, think about the type of heater that best fits your needs. Propane heaters are portable and powerful but require a tank, which you will need to refill or replace. Natural gas heaters connect to a home gas line, so you never run out of fuel, but they must be installed by a professional and are not portable. Electric patio heaters are easy to use and require no fuel, but they typically produce less heat and can be more expensive to run. Infrared heaters, whether propane or electric, direct heat at people and objects rather than the air, making them more efficient in breezy conditions. Consider how you will use the heater: if you want to move it around, propane is likely best; if you have a permanent spot near a gas line, natural gas offers convenience.
Also, check the clearance requirements. Most manufacturers specify a minimum distance from walls, ceilings, and combustible materials. A typical full-size heater needs at least 3 feet of clearance from the top and sides. Ignoring these guidelines can lead to fire hazards or reduced performance. Finally, look for safety features such as an oxygen depletion sensor (ODS), a tip-over switch, and a built-in thermocouple. These are standard on quality heaters and can prevent accidents.
Many patio heater problems stem from user error rather than defective parts. One of the most common mistakes is storing the heater outdoors without a cover during the off-season. Rain, snow, and dust can corrode the burner, clog the orifice, and damage the igniter. Always cover your heater or store it in a dry place when not in use. Another mistake is using the wrong size or type of gas hose. Hoses degrade over time, and a cracked hose can leak gas, creating a serious safety risk. Inspect the hose regularly and replace it if you see any signs of wear.
People also often forget to check the gas tank level before a gathering. A tank that feels light may still have some propane, but the pressure can drop in cold weather, causing the heater to burn weakly or go out. Keep a spare tank on hand or use a gauge to monitor the level. Additionally, never operate a patio heater in an enclosed space such as a garage, tent, or screened-in porch without proper ventilation. Carbon monoxide is odorless and can be deadly. Even in a partially enclosed area, ensure there is plenty of fresh air circulation.
Another frequent error is over-tightening connections. This can strip threads or damage the regulator, leading to leaks. Tighten connections by hand plus a quarter turn with a wrench. Also, avoid placing the heater where it can be knocked over by pets or children. Use a stable base and, if possible, secure the heater to a wall or railing. Lastly, do not ignore the smell of gas. If you detect a gas odor, turn off the heater, extinguish any flames, and check for leaks with soapy water. If the smell persists, evacuate the area and call a professional.
If a patio heater is not the right fit for your space or budget, there are several alternatives to consider. Fire pits and chimineas burn wood or propane and provide both warmth and ambiance. They are great for gathering around, but they require more maintenance and produce smoke, which may bother some people. Outdoor fireplaces offer a similar experience with a more permanent structure. However, they can be expensive to install and may be subject to local burning regulations.
Electric infrared heaters are another option. They are clean, quiet, and easy to install, often mounting on a wall or ceiling. They heat objects and people directly, so they work well in covered areas. However, they require an electrical outlet and may not be as powerful as propane models. Another alternative is a heated blanket or heated seating, such as chairs with built-in heating elements. These are energy-efficient and provide targeted warmth, but they are not practical for standing areas or large groups.
For those who want to extend their outdoor season without a dedicated heater, consider using a pergola with a retractable roof or side screens to block wind and retain heat. Strategic landscaping, such as planting shrubs as windbreaks, can also make a patio feel warmer. Finally, simply dressing in layers and using blankets can be a cost-effective way to stay comfortable. Evaluate your needs and budget to choose the best solution for your outdoor space.
A: That clicking sound means the igniter is working. The issue is likely a lack of gas flow. Check that the gas tank is open and the hose is clear. Also, the electrode might be sparking to the side instead of the burner, so adjust the electrode position.
A: Most patio heaters are not designed for heavy rain. Water can damage the electrical components and cause corrosion. If it starts raining, turn off the heater and bring it under cover. Once it’s dry, you can use it again.
A: At least once a season, before regular use. If you live in a dusty area or use it frequently, clean it more often. A clean heater is safer and more efficient.
We don't accept free units or payment for placement. Our rankings combine verified manufacturer specifications, real owner feedback and availability, compared on one transparent S to C rubric.
Honesty note: We have not hands-on tested every product mentioned on this page. Where we have not personally used a product, any ranking referenced here is based on verified specs, aggregated owner feedback, availability and editorial comparison rather than a hands-on review.