The gas valve is an essential component of your gas furnace and plays a key function in maintaining a comfortable indoor temperature. In response to commands from the thermostat, this valve controls the flow of gas from the pipeline to the burner in the furnace. A gas valve is opened when the thermostat detects a demand for heat; the gas heater is then ignited, either by a pilot light or an electronic ignition, and the heat is spread throughout each room in your home.

Identifying Issues with Your Furnace Gas Valve

Several indicators might suggest your gas furnace or gas valve is experiencing issues, such as:

  • Heating Inefficiency: A furnace that fails to heat adequately might be suffering from a gas valve that isn’t opening as it should.
  • Gas Odor: The smell of gas in the vicinity of your furnace poses a significant risk, potentially pointing to a leak at the gas valve.
  • Pilot Light Complications: Trouble with keeping the pilot light lit or igniting the burner might trace back to valve problems.
  • Unusual Moisture Levels: Excessive moisture near your furnace or within the venting system can signal a dysfunctional gas valve.
  • Odd Sounds: Sounds that are out of the ordinary upon startup might indicate the gas valve is having difficulty operating properly.

Troubleshooting and Addressing the Most Common Problems with Valves

A few common snags that can affect furnace gas valves include obstructions from dust, dirt or debris, mechanical failures like a jammed or broken valve, and complications with the unit’s electronic controls. Here’s how you can start troubleshooting common issues:

  • Pilot Light Inspection: Verify the pilot light is active and that its flame is robust and properly aligned, as this can hint at issues with gas flow or pressure.
  • Debris Check: Investigate for any blockages that could impede gas movement. This usually means turning off the gas at the main valve for safety prior to any inspection.
  • Gas Pressure Evaluation: Inaccurate gas pressure might inhibit the valve’s ability to open. This assessment should be conducted by a skilled HVAC specialist to ensure precision and safety.
  • Electrical Connectivity Review: The functionality of the valve can be affected by electrical issues, such as disconnected or damaged wiring or faults in the control board. It’s important to inspect for any such problems.

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Braeden RigbyBraeden Rigby
19:47 25 May 24
Comfort Union should be your first choice for all your HVAC needs. Amazing family run business with a people first approach that is difficult to find. Highly recommended for anyone that values quality work !
premnath parthibanpremnath parthiban
14:52 23 May 24
I spent almost one year to find the best HVaC replacement company and finally landed with Comfort union .I initially thought it was a small job but then realized the magnitude of work and effort it goes into it ..Asif initially came to my house , explained to me everything in detail including what is code of guidelines expected by city of Calgary , that showed his knowledge on the whole process ..Then came his brother Moore for installation - you will never find such a wonderful person who knows in and out of the HVAC and moreover the most patient person I have ever seen .. he did the whole installation with absolute craftsmanship and love for the work he did .. the best part was his perfectness and every work he did was so perfect and tidy !Finally, came Khan ji - to do the final inspection to add perfectness over the perfectness carried by Moore .. He did inspection and made sure everything was 200% correct ..Overall , I would recommend comfort union over any other service provider …Replaced my furnace , water tank and my humidifier …
JJ YanJJ Yan
02:22 22 May 24
Muhamad and Darryl did an excellent job on installation of our new Bradford White 75 gallon water heater. Extremely professional and hard working. They not only just did the work, but also explained the procedure thoroughly and maintenance focus points. Kept the work place tidy and in order. Highly recommended to everyone. JJ
mr2008 2.0mr2008 2.0
04:08 12 May 24
excellent carrier furnace and air conditioner installation, highly recommend to others
20:52 06 May 24
It was great to see a father and son team work so professionally in the delivery and installation of our new Bradford White water heater. Thanks team for a wonderful job.
Arman GillArman Gill
03:21 30 Apr 24
Friendly staff and did amazing work with carrier hvac
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02:59 30 Apr 24
Amazing work. Good work on AC installation. Competive rates
Fast response due to the urgent occasions. The team is very experienced. Highly recommended!
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23:04 06 Apr 24
Comfort union offers top notch furnace and hot water tank replacement services - contact the best furnace company in Calgary for all your needs. Highly recommended!!
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18:28 02 Apr 24
Great and reliable service.
sunny Maharjansunny Maharjan
10:11 01 Apr 24
Best reasonable and quick in their response.
E TanE Tan
01:45 31 Mar 24
I recently hired Comfort Union to install a new hot water tank in my home, and I couldn't be more pleased with the results. They went above and beyond to ensure that the installation process was smooth and hassle-free from start to finish.Daryl's expertise and professionalism were evident from the moment he arrived at my home. He took the time to assess the layout of the space and discuss the best options for the installation, providing valuable insights and recommendations along the way. His attention to detail and commitment to quality craftsmanship were truly commendable.Throughout the installation process, Daryl and Mo worked efficiently and diligently, ensuring that everything was installed correctly and functioning optimally. They were respectful of my home, taking care to clean up any messes and leaving the work area spotless once the job was complete.I would like to extend my sincerest thanks to the entire team at Comfort Union for their outstanding service. Thanks to their expertise and dedication, I now have a reliable water heater that meets my needs perfectly. I would highly recommend Comfort Union to anyone in need of plumbing services – their professionalism and quality workmanship truly set them apart.
Ayaan DawoodAyaan Dawood
06:38 10 Mar 24
Imran Ahmed KhanImran Ahmed Khan
06:04 10 Mar 24
Maggie VaccaroMaggie Vaccaro
21:26 05 Mar 24
Quick response for appt. Came over and got all work done.Will call them again and will recommend them to others. Thanks!
Ashirul PatelAshirul Patel
22:57 26 Feb 24
We had great experience. They work out an efficient way to solve our furnace issues while maintaining the minimum cost.
Rakesh SachdevaRakesh Sachdeva
04:44 10 Feb 24
Muhammad is very professional and very cooperative. He has completed the work as explained. Everything was completed on same day we had issue. Very responsive.
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22:28 08 Feb 24
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02:33 07 Feb 24
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Matt MelliesMatt Mellies
21:21 22 Jan 24
I had an issue with my furnace, went to reset my main breaker to power cycle trying to troubleshoot it... Breaker crapped out so I was sitting on an electrical, and furnace problem.Gave these guys a call and they were able to come out within 2 hours. Required a full main breaker replacement, and new gas valve on my furnace. They diagnosed it in only a couple hours, and fixed everything the same day.Had a great experience, the technicians that showed up were professional, and very knowledgeable. I'll definitely be using these guys when I eventually have replace my aging furnace.
Sharif ZayedSharif Zayed
00:15 22 Jan 24
Khan was so kind and considerate to help me during the -45 C calgary weather. We decided to replace our old furnace with newer and advance features choosing Carrier Furnace. We received the quote from Comfort Union which was competitively priced and the job was completed next day. Thanks.
Syed Zaigham RizviSyed Zaigham Rizvi
05:29 18 Jan 24
Had a bit of a crisis with rental property heating system in Calgary, our Goodman furnace gave out and had countless furnace repairs over the years. They got a new Carrier furnace installed quickly and very competitively priced compared to other carrier dealers. Wasn't expecting such quick service in the cold months. Definite recommend!
Mohammed SiddiqiMohammed Siddiqi
00:23 06 Jan 24
Absolutely stellar service from this HVAC company! The team was prompt, professional, and incredibly knowledgeable. They swiftly diagnosed and fixed our heating issue with precision. Their attention to detail and commitment to customer satisfaction truly set them apart. A 5-star experience – our go-to HVAC experts!
Agit KokuAgit Koku
21:40 13 Apr 23
I recently had Comfort Union come to my home to fix an issue with my hot water tank's pilot issue. Not only did the technician promptly fix the issue, but they also took the time to clean out my drain as a courtesy. I was impressed by their attention to detail and their commitment to providing excellent customer service.I would highly recommend Comfort Union for anyone in need of plumbing services.

Frequently Asked Questions about a Furnace Gas Valve

How to locate your main gas shut-off valve?

You may typically find the main gas shut-off valve close to your gas meter. You can locate this meter on the outside of your house, usually towards the rear or side, near the spot where the gas line comes into your property. The gas flow can be turned off by turning the shut-off valve, which is often a lever.

In case of an emergency, knowing its location is vital for turning off the gas supply fast.

How to Check if Your Gas Valve Won't Open?

If your gas valve is stuck, you can hear it trying to open by listening for a clicking sound when the furnace turns on; this means the valve is getting the signal to open but is becoming stuck. Although most diagnostic tests, such as examining the valve’s solenoid with a multimeter, necessitate technical knowledge, visual checks for clear indications of damage or obstruction can also be instructive.

What If Your Gas Valve Is Fine But The Furnace Still Isn’t Working?

Problems with the gas valve aside, the thermostat, pilot light, ignition system, or electrical system of the furnace could be to blame if it continues to fail to operate. Make sure the batteries are in good shape, check the thermostat settings, turn on the pilot light (if it’s an older type), and look for any sign of damage or loose wires in the electrical connections.

How Can You Open a Furnace Gas Valve That's Stuck Closed?

Mechanical failure or debris accumulation are two possible causes of a jammed gas valve in a furnace. If your gas valve becomes stuck, you should not try to open it or fix it manually because of the dangers of gas pressure and leakage. An HVAC technician should be hired for this job.

How to turn off the gas shut-off valve to appliances?

You can stop the flow of gas to a certain device by finding its gas shut-off valve. A few feet distant from the appliance, this is often located on the gas line. Direct the valve to the off position by turning it 90 degrees. If a gas leak were to occur in a particular appliance, this would be extremely helpful during maintenance.

How To Check If Your Gas Valve Has Failed?

If you suspect a gas valve isn’t working, there are a few things you may check: whether the thermostat is requesting heat, whether the valve is receiving electricity, and whether the pilot light or ignition system is working. A multimeter test for electrical continuity in the solenoid of the valve will provide a more comprehensive diagnosis of common issues.

Can You Replace A Gas Valve of my Gas Furnace On Your Own?

Handling the gas line and making sure the furnace is safe and working properly after installation are involved in replacing a gas valve. It is strongly recommended that only licensed HVAC professionals perform this work and work on the replacement valve because of the intricacy and hazards involved, such as the possibility of gas leaks or incorrect installation.

Severe safety risks, as well as potential violations of municipal codes and warranties, can arise from do-it-yourself projects.


The furnace gas valve plays a pivotal role in the safety and efficiency of your home heating system. Regular maintenance and professional inspection can prevent common problems and ensure that this crucial component operates correctly.

Should issues arise, understanding the signs of a gas leak or valve malfunction and seeking prompt professional assistance is key to maintaining a safe and warm home. Remember, when it comes to gas appliances, safety and expertise should always be your priority.

Choosing professional help to get gas-powered unit installed or repaired is crucial. With Comfort Union, you have access to seasoned experts dedicated to the health of your gas supply and HVAC system, from routine maintenance to intricate furnace repair. Their commitment to service guarantees peace of mind and consistent warmth in your home.

Comfort Union offers expert services in maintenance, setup, replacement, and repairs for HVAC systems, such as a water heater, air conditioning system, furnace vents, and more, focusing on safety and reliability. Their specialization in swiftly resolving furnace gas valve issues ensures your heating system operates smoothly, minimizing disruptions to your comfort.

Contact us to learn more about our services!

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