Dec 02, 2015 limited warranty period is 5 years for parts and 20 years for heat exchanger if not the easy touch of total comfort. Mar 11, 2006 secondly, a crack in a heat exchanger cant let hardly any gases pass through because the opening is so small plus the pressure from the blower is much greater then the pressure inside the heat exchanger. Nucalgon heat exchanger crack finder solution, heat. Furnace flame rollout safety furnace trouble shooting help. Comfortmaker ahx 25 ton split system fan coil specification sheet. Comfortmaker replacement parts fast shipping at repair clinic. Cracked heat exchanger inspecting hvac systems internachi. A cracked heat exchanger might allow products of combustion to enter the air stream. Cracked or corroded gas furnace heat exchangers leak co and other poisonous gasses into the home living area though air ducts. The issue is that the furnaces front partition has a hairline crack just above the center burner. Corrosion is the second most common reason that heat exchangers crack. When you factor in the cost of labor for most heating and air conditioning companies, it gets expensive. Comfortmaker is a brand synonymous with superior manufacturing so when its time for a repair, its time to turn to your trusted online parts store, repairclinic.
A heat exchanger is a heat management system that uses fluids to transfer heat from one medium to the other. Combustion pollutants, such as carbon monoxide, nitrogen dioxide and sulfur dioxide, can cause eye and nose irritation, disorientation, sleepiness and nausea. It is a set of metal tubes or coils that connects to the burner assembly and ends at the vent or flue pipe. This can cause a fire or burned wiring and should trip the roll out switches, which are temperature sensors located near the front and above the burners. The good news is that most furnace manufacturers offer an extended parts warranty for a heat exchanger that lasts anywhere from 10 years to a limited lifetime warranty the bad news is that the parts warranty only covers the cost of the actual heat exchangernot the labor required to replace it. A cracked heat exchanger is pretty serious, as far as safety for your home goes. May 12, 2000 miss a cracked heat exchanger and you put the homeowners at risk. The heat exchanger is the furnace component that heats air. Comfortmaker furnace with cracked front panel heating help. If you have a steel exchanger, then cut down a piece of sheet metal to cover the crack, plus 2 inches all the way around. Ive found it very informative as i try to troubleshoot my problem.
This chart does not show every heat exchanger in every model of furnace. If theres a crack in this component, the gases being burned off, such as carbon monoxide, sulfur dioxide, and nitrous oxide, could leak into your home, causing illness or, in extreme cases, death. Fire up a welder, and use the liquid metal to form a gluelike line around the edge of your sheet metal. Direct spark ignition system with remote sensing provides years of reliable starts. Here are some signs that may indicate your issue is a cracked or malfunctioning heat exchanger. The following chart shows new heat exchangers from various manufacturers gas furnaces. Furnace heatexchanger crack signs your furnace has one.
He didnt offer repairing the heat exchanger as an option told me they had a lot of problems with the model. Air and gas are separated within the heat exchanger to prevent mixing and exposure to harmful combustion byproducts, such as carbon monoxide. If this is not effective, a thorough check of the furnace heat exchanger should be done. In short, when the heat exchanger cracks, the furnace is finished. The american gas association has even put this in writing they say any visible crack or hole is reason. Pressure switch is the safety device that proves the ventor motor is working motor above burners connected to vent.
Another possible cause is a combustion air intake pipe getting a plugged screen, which will cause the room to work in a negative air pressure. Dec 02, 2015 proper diagnosis of a failed or cracked heat exchanger. The heat exchanger in your hvac helps to transfer heat from the furnace to the air flowing through the ductwork. Diagnosis of a heat exchanger crack typically starts with a no heat service call. The cause of cracked heat exchangers avoid this common scam. Even though henry did not find a crack or breach of the heat exchanger, the flame rollout and the. Here are the most common reasons your comfortmaker furnace isnt heating and the parts. Comfortmaker packaged allinone units are designed for the best durability and comfort.
A gas furnaces heat exchanger is the furnace component that actually heats the air. Since operating the furnace, there is a very distinct burnt. Comfortmaker heating problems hvac contractor talk. If there is any furniture in the vicinity of the air vents which blocks them or you close the vents in some of your rooms, your furnace will receive a. Comfortmaker 3 to 5 ton 3phase vertical blower coil specification sheet. If a crack has developed, air from the house will be forced into the combustion chamber when the blower turns on, causing some visible disturbance of the flame, he says. It has vacuum lines that are connected from the pressure switch to the ventor motor that measure a neg air pressure. What are some tell tale signs of a cracked heat exchanger. A crack in your heat exchanger can kill everyone in your home in as little as 10 minutes. Sep 17, 2015 this makes heat transfer difficult which again causes the heat exchanger to overheat and crack. How much does it cost to replace the heat exchanger in my. This makes heat transfer difficult which again causes the heat exchanger to overheat and crack. The units stay enclosed outside or on roofs and come in a variety of combinations.
Our recommendation on finding a crack in a heat exchanger will always be to replace the heat exchanger or the furnace it is in because your familys health and safety is far too important to make guesses and assumptions about how dangerous. Miss a cracked heat exchanger and you put the homeowners at risk. Also, as i mentioned previouslythe issues with the secondary heat exchanger cracking. Limited warranty period is 5 years for parts and 20 years for heat exchanger if not the easy touch of total comfort. If the igniter fails or cracks, the furnace wont heat. Pdf repair of tubetubesheet weld cracks in a cracked gas. Most of this air is simply recirculated over and over, but in addition, a small amount of fresh air usually is pulled in through cracks.
Replacing comfortmaker cracked heat exchanger from start to finish with close up view of large crack at end of video. The american gas association has even put this in writing they say any visible crack or hole is reason for requiring replacement of the heat exchanger or furnace. Should i replace my furnaces heat exchanger or get a new. Its comprised of a set of tubes or coils that repeatedly loops through the airflow inside the furnace to heat the air. Its like the doctor that finds cancer it might not be good news, but it. A cracked heat exchanger allows air from the furnace blower to interfere with the flame causing it to. Once you are ready to begin the repair itself, put on your safety glasses and gloves. Then air will be pulled in through the exhaust vent pushing flames out of. Prevent a cracked furnace heat exchanger romaniuk edmonton.
Signs and symptoms of a cracked gas furnace heat exchanger. If the part is under warranty but not available, ask the contractor to call the manufacturer and request the cost of the. A heat exchanger crack in a residential furnace large enough to cause trouble usually upsets a steady flame or causes the burner flames to roll out the front of the burner openings. Diagnosis of a heat exchanger crack typically starts with a noheat service call. In some rare cases, it can cause flame impingement when air from the blower enters the heat exchanger.
The contacts in the switch are either stuck together or moisture has entered the switched and seized it in the closed position. Serious cracks were found at tubetotubesheet welds during the start up operation of a cracked gassteam heat exchanger in a gas plant. Proper diagnosis of a failed or cracked heat exchanger. The burners bolt to the front of this panel, and the heat exchanger bolts to the back. Back in april i had installed a new comfortmaker by icp 14 seer ac with a 92% furnace. And if someone is checking carbon monoxide in your duct work to determine a bad heat exchanger, i would be very concerned. The heil and comfortmaker earlier models had a tendency for the burners to rust over and this in turn would soot up the primary heat exchanger. First of all many thanks to all those who keep this forum going. The shape of the coils depends on the type or model of your furnace. If the heat exchanger is under warranty, this is a good way to go.
Comfortmaker 3 to 5 ton split heat pump specification sheet. Were you recently told that your furnace heat exchanger is cracked and needs to be replaced. Find them too often, and your company could get a rep for using scare tactics. Two types of furnace warranties come into play here. This includes installation, the thermostat, and cover 3rd quote. All furnaces will have different pressures required to operate properly, most times the pressure will.
Dec 25, 2011 the heil and comfortmaker earlier models had a tendency for the burners to rust over and this in turn would soot up the primary heat exchanger. Its an 810 hour job for most teams of hvac technicians. From what ive been told and read, it could mean that my heat exchanger is cracked. Comfortmaker furnace with cracked front panel heating. Looking for a furnace repair or replacement in new jersey. Tubular stainless steel heat exchanger is more corrosionresistant for longer lifeand delivers efficient heat transfer and airflow. Either the heatexchanger or furnace must be replaced your options if the heatexchanger has cracked. The byproducts of combustion can be very corrosive. The service technician has the time, experience, or even reason to suspect the exchanger is cracked. The proven rpj rigid press joint stainless steel heat exchanger is. A damaged or cracked heat exchanger is the cause of the leading cause of carbon monoxide poisoning in north america.
Should i replace my heat exchanger or buy a new furnace. Combustion gases leaking from a cracked heat exchanger can cause frequent headaches as well as flulike symptoms. Unfortunately, this bold statement is absolutely true. The heat exchanger is always under negative pressure, so you would need a massive hole in the heat exchanger to get any co in the duct work. A visual guide to a highefficiency condensing furnaces. Comfortmaker furnace furnace not heating repair parts. Pdf repair of tubetubesheet weld cracks in a cracked.
From the front of the furnace, the flame should move smoothly into the heat exchanger. Either the heat exchanger or furnace must be replaced your options if the heat exchanger has cracked. Located in the center of the furnace, it is where fire, gas and heat connect. Failure analysis of tubetubesheet welds in cracked gas heat. When the the cycle stops, i dont hear any hissing after which could mean water leaking out of the exchanger. We have the comfortmaker furnace parts, heat pump parts and air conditioner parts you need for a quick and easy diy repair. What are the common causes of heat exchanger in a gas. The draft inducer motor draws air into the heat exchanger and then exhausts it out the flue. The ac has worked very well and because i live in the south we havent had to use the furnace until just recently. Co is produced as a result of incomplete combustion. Some cracks have been known to only open when the unit is fired and the heat exchanger metal is hot. In the event that it is cracked, a bridge is created between these two areas. If there is any furniture in the vicinity of the air vents which blocks them or you close the vents in some of your rooms, your furnace will receive a sufficient amount of airflow. Comfortmaker replacement parts fast shipping at repair.
Nov 18, 2012 possible heat exchanger has a hole or big crack. I noticed the other day the my how water boiler had flames dancing around underneath the heat exchanger. Mar 19, 2007 the crack is open when the heat exchanger metal is at or close to room temperature. Bobs answer to whether or not a cracked heat exchanger can be dangerous is unambiguous. The governments environment protection agency has set a.
If this happens, first remove the burners and clean them. Carrier common furnace problems premature heat exchanger. This allows for some of the fumes from the furnace to be. Bad burning smell from brand new comfortmaker 92% furnace. Due to high demand for nucalgon heat exchanger crack finder solution, heat exchanger inspection system, availability is subject to change without notice. If you feel any roughness, deformation, crack or burn through, proceed with replacing the heat exchanger with 37323701. Pressure switch fails closed normally this would indicate a failed pressure switch, the furnace will test to make sure the switch is open before starting the ventor motor.
The cause of the failure has been analyzed, and the. Comfortmaker furnace heat exchanger forced air furnace. I also recollect finding failed heat exchangers in furnaces from arcoaire, carrier, comfortmaker, heil, janitrol, rheem, ruud, trane. Any rollout of the flame could cause flame sense problems. Your heat exchanger may be different based on the model and the year of manufacturer. Bard furnace and air handler parts heat exchanger superior. Carrier high efficiency gas furnace heat exchanger issues one the most common issues found in carrier high efficiency gas furnaces is corrosion or blockage is their secondary heat exchangers in approximately 5 to 10 years after the original installation date or in other words premature secondary heat exchanger failure. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. It is important that the heat exchanger is taken care of as hazards can build from a faulty exchanger. The heat exchanger is a key part of the furnace and is responsible for the actual heating of air.
Like all comfortmaker gas furnace parts listed on the website, blower motor part number 1012514 is a genuine oem part and can ship quickly. In an attempt to sell new furnaces, numerous heating contractors will lie about cracked heat exchangers. The manufacturer of the unit in question says to use a bright flashlight to visually check the heat exchanger tubes and if any sign of the heat exchanger being compromised is found the technician should shut down and disable the unit. A cracked heat exchanger allows air from the furnace blower to interfere with the flame causing it to flutter or even roll out. Comfortmaker furnace making noise and a cracked heat exchanger. Dec 14, 2016 bad burning smell from brand new comfortmaker 92% furnace ive found it very informative as i try to troubleshoot my problem. This trips a safety switch and shuts down the furnace. Bearings were going on the inducer motor and i did a heat exchanger check and this is what i found. With a no hassle warranty, at least youll get a new furnace. The crack is open when the heat exchanger metal is at or close to room temperature. A from the manufacturer, and i was posting to see if anyone knows of an extremely high temperature sealant that can be used to temp. Carrier bryant payne clamshell heat exchanger made with aluminized steel armstrong lennox.
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