DIY Ways to Fix Your Gas Heater

7 October 2014
 Categories: , Blog


Nothing instills a feeling of dread more than turning on your gas furnace and hearing only a dry click. However, there are a few simple fixes you can attempt before calling the professionals. Read on to learn more about how you can fix your broken or malfunctioning gas heater.


The key to identifying which component has a problem is in identifying the problem itself. Below are some common issues, as well as the typical causes of these issues.

If your heater fails to turn on altogether:

If you turn the knob or switch and nothing happens, don't panic. It could be one of several easy-to-fix problems.

  • It's possible that a fuse or breaker was tripped and there is no power going to the heating unit. Check your circuit breaker and replace the fuse or resetting the breaker should solve this issue.
  • Next, check to be sure your heater's fans are set to "on" mode.
  • Finally, if you've been using your heater frequently over the last few hours, the system may simply be overloaded. Wait a few minutes and try to turn the heater on again.

If none of these steps solve your problem, it's probably time to call a professional such as Redlands Plumbing Heating & Air Conditioning.

If your heater turns on, but only blows cold air:

  • First, check your pilot light. If this tiny flame has been extinguished, your heater has no ignition source to create heat. Simply relighting the pilot light should solve this problem.
  • Second, if you're heating from a closed propane or natural gas tank, check the level of fuel. Sometimes, a leak in the tank can cause you to run empty even if you think you have enough fuel.

If neither of these problems are present, you'll likely want to contact a heating professional to do further troubleshooting.

If your heater turns on and blows warm air, but the air flow seems restricted:

  • If your heater is functioning, but simply not blowing as quickly or forcefully as it usually does, the problem is probably with the air filter. Remove the filter and inspect for (and remove) any visible debris. If your filter is soiled, you should order a replacement filter.
  • If the air filter appears fine, you should next inspect the circulating fans. If these fans are not functioning, there is nothing within the heater to force air into the vents. If there is no visible obstruction, the fans will probably need to be replaced.

Hopefully some of these tips have given you a starting point to diagnosing and repairing some common gas heater problems. Although there are some problems that are best left to the professionals, fixing the minor problems yourself can save you hassle, money, and keep you warm.