If you have an old furnace, this small part plays an important role in your furnace!
What Is a Thermocouple?
Prior to 1993, all gas furnaces were made with a standing pilot light.
If you have a furnace that was installed after 1993, it comes equipped with an electronic ignition, so no pilot light is needed.
A thermocouple in essence is just a small safety device that detects whether or not your furnace’s pilot light is on.
It is a small metal rod made of two different metals that is located near the pilot light and hooked into the gas valve.
It works by utilizing the “Seebeck effect”, named after Johnann Seebeck, who found that two different types of metals in close proximity to each other will create an electric charge in relation to the overall heat that they sense.
When the pilot light is on, the thermocouple can sense the heat from the flame and it in turn sends the proper voltage to the gas valve to keep it open and ready to ignite the burners.
If your pilot light goes out, it will lose it’s voltage and your gas valve will close to prevent gas from leaking into your home, or even worse flooding the combustion chamber and catching a spark that can cause an explosion.
Common Thermocouple Problems
One of the most common problems with a thermocouple is it becoming dirty and in turn giving off improper readings and closing off the gas supply to your furnace.
A thermocouple failure is a common furnace repair, so it is best to make sure you have it maintained on a regular basis by a professional HVAC company.
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A five star review does not begin to explain the experience we had today. To start the first gentleman to come diagnose the air conditioning issue we were having was down to earth and most importantly honest. He gave different options as well as his opinion. After weighing pros and cons we went with the complete new unit. They came out on the day and time as promised. They introduced themselves and we walked them to the basement and they quickly got to work. They wore booties on their shoes (not at our request, but rather a courtesy) acknowledged my children and dogs which is huge to me then went over everything as they were removing and installing. Cleaned up like they were never here, set everything up for us and made sure it was working properly as designed. Huge shout out to SHC and will 100% be recommending to neighbors.
Adding on to my initial review of Sears from my experience last year since it does not appear Google allows me to just add a new review. I will keep this one short since it just reinforces the previous 5-star review I left. Again had an A/C problem after hours (this time a Sunday evening, 6:00ish or so). Called Sears and had the on-call tech paged. He called back so quickly, I almost didn't answer b/c I didn't recognize the number and it didn't click that I would get a call back so fast. Did not go with the after hours call out, but was set up with an appointment the next day. Joel T. was sent out and did a great job in diagnosing the issue. Unfortunately, the issue is not worth repairing b/c of the cost vs age of the unit; however, it can limp along for a little while longer while I thoroughly weigh my replacement options. Joel provided replacement estimates at a few different cost points, understood my need to call around for multiple estimates before deciding, and even called back later in the day to advise the office located one other lower cost option he previously thought was not available. Through all of this, Joel presented everything matter of fact - it was not a high-pressure sale pitch, proclamations of doom and gloom if I didn't commit to replacing right away, etc. Just good conversation about my options through Sears.Last night around 9:45 I realized my A/C was not working. Neighbor recommended Sears Heating and Cooling (not Sears and Roebuck, she made sure to mention). I called and spoke with a very nice lady who advised the on call tech was only on call until 10:00 and offered to page him for me. I was not sure if I wanted to have the tech paged so close to quittin' time, but she assured me it would not be a problem. So, the page went out around 9:57, and I got a call back at 10:00. We discussed the issue and the offer was made to come out in that night, but I declined. The on call tech entered my information and said the office would give me a call between 8 and 10 in the morning to schedule something. At about 8:05 the office called and said someone would be out between noon and 6. Turns out, the tech (Austin) finished up a nearby job around 10:45 and was at my house by 11:00. He quickly diagnosed the problem, presented the repair options, and helped walk me through deciding the route to take. While he advised there were several levels of repair options, he went over the lowest cost one and the next level up with a better replacement part and warranty only. He felt given the age of the unit and the cost after the 2nd repair option, it made no sense to discuss the higher cost options because they just were not worth it.Long story short, Sears Heating and Cooling was very courteous, professional, helpful and better than on time. I am thankful for the neighbor's recommendation and understand why she has used Sears for 20 years. I asked Austin about the service club and he provided very good information about it, presented a valid points on why it is a good idea and recommended I call the office to discuss further if I had more questions. He did not try to push it on the spot, which was appreciated. I have seen other reviews about the cost of Sears, but I have also seen the response that they strive to be competitive, not the most expensive - not the cheapest, but the best value. This is a strategy I agree with, it is not always about being the cheapest...it's about providing the best bang for the buck, and Sear accomplished that for me today. Prompt service, reasonable cost, and most importantly, I am sitting in a cool living room on a hot, humid evening.
Heating maintenance. I feel so blessed to have this company in my life. Josh/Sears go above and beyond to take care of our maintenance/installation needs and more.Annual A/C maintenance. I’ve used this company for years and the young man initiate helpful suggestions.7-6-2023 - I had my annual A/C cleaning/maintenance check. I’ve used this company for years and I have been pleased each time. The young man that performed the service was very kind and I felt that Ramon is very competent.