We have a Conquest 80 gas furnace. When it tries to fire up, it cuts out. Sometimes takes 2 or 3 tries before it fires up. On more than one occasion it has tried 4 times, then shut down. Furnace man has cleaned the sensor and replaced the igniter. Now he's put in a new circuit board ($250). I have a Comfort-Aire Conquest 80 Gas Force-air furnace. Www.justanswer.com › HVAC Question - I have a Comfort-Aire Conquest 80 Gas Force-air furnace. Find the answer to this and other HVAC questions on JustAnswer. Related searches for conquest 80 furnace Some results have been removed Related searches Conquest 80 Furnace Manual.
← All help articlesDecember 12, 2016
When your thermostat is set to AUTO, your furnace fan should blow only when your furnace is in the middle of a heating cycle. But if your fan runs constantly, regardless of whether your furnace is heating, that’s not normal.
So, what’s causing it to run continuously? Well, if your furnace blower fan won’t stop running, you could have any of the following problems:
- You’re using the wrong thermostat fan setting
- Your fan limit switch is on “manual override”
- There’s a shorted thermostat wire
- There’s a shorted wire at the fan limit switch
We know. That’s a lot of possible problems. But don’t worry, we’ll walk you through some troubleshooting steps so that you can pinpoint your issue. We’ll also let you know when you’ll need a professional to solve the problem.
Live in the Phoenix area and need a tech now? Just contact us and we’ll send a professional over immediately.
First, check your thermostat settings
First off, let’s confirm that your thermostat is set correctly and isn’t calling for continuous heat or forcing the fan to blow non-stop. Follow these troubleshooting steps to do that. Neat video noise reduction software, free download.
1. Set your thermostat to a temperature that’s lower than the current room temperature. This shuts the furnace down and prevents your thermostat from calling for more heat. If the furnace was in the middle of a heating cycle, wait 3 to 4 minutes for the blower fan to stop running.
Did your furnace fan stop blowing? If so, it’s likely that you’ve set your set temperature too high, causing your furnace to heat continuously as it tries to reach that temperature. Another issue that could cause your furnace to heat constantly is a house that isn’t weatherized properly, allowing cold air to enter the home as hot air escapes.
Utorrent for mac 10.7.5. If your furnace continues to heat constantly but can’t reach your set temperature, have a professional inspect your system and home and provide possible solutions.
If your furnace fan is still blowing, continue onto step 2…
2. Make sure your fan is set to AUTO and not ON. If your fan is set to ON, it will run continuously, regardless of whether your furnace is heating or not. Tip: Avoid setting your fan to ON, it wastes money because it forces the fan motor to run constantly.
Second, troubleshoot for fan limit switch problems
Your fan limit switch is located directly under your furnace hood and controls when your furnace blower turns on and off. A probe inside the switch monitors the temperature of the burner assembly to turn the fan on once the burners are hot and turns the fan off once the burners cool down (when the thermostat stops calling for heat).
But if your furnace fan won’t stop running, two problems you might have with your furnace fan limit switch include:
- The switch has been set to manual override
- The switch is faulty and needs to be rewired or replaced
Follow these troubleshooting steps to determine which of the above is your problem:
1. Locate your fan limit switch and check to see if the white knob (see pic below) is pressed in. If so, your switch is set to manual override, or “always running” mode.
1. Locate your fan limit switch and check to see if the white knob (see pic below) is pressed in. If so, your switch is set to manual override, or “always running” mode.
2. Pull the white button out to reset your fan limit switch to AUTO. This will cause the fan to automatically turn on when the furnace is heating and shut off once the call for heat stops.
If your fan limit switch was already set to AUTO (not pressed in), then you most likely either have a problem with your thermostat wiring or the fan limit switch is bad. Unfortunately, you’ll need a professional to fix both of these problems.
Need help from a Phoenix tech?
If your furnace fan is still running non-stop, we can help.
Just contact us and we’ll send over an experienced Phoenix tech who can fix your furnace fan problems!
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At just 34-1/2' high, our 80% space-saving furnace is ideally suited to both new construction and replacements - models can fit into the space of virtually any furnace being replaced, including attics, crawl spaces and utility closets. Contractors will appreciate not just the small size, but also the number of installation options, including left- or right-side gas, and left- or right-side electric connections. Because of the small size, it's easy to handle, fitting easily through most doors and hallways. Free tie dye wallpaper for mac.
AFUE ratings of 80% mean that nearly all the heat generated by the furnace is used to heat the home. In this time of soaring fuel prices, better utilization of natural resources can mean significant dollar savings.
The GUH Upflow/Horizontal Series comes in capacities ranging from 45,000 BTUH to 126,000 BTUH, while the GDD Downflow Series is available in 54,000 to 126,000 BTUH capacities.
Completely assembled, the furnace is ready for installation with a color-coded wiring harness and quick connect fittings. The integrated solid state control board speeds installation. Maintenance and servicing is easy to do with readily accessible components. Two-piece doors remove quickly and door screws are secured to the doors so they can't be lost after they're loosened. Diagnostic lights make it easy to troubleshoot operation.
80% furnaces are backed by a 20 year warranty on the aluminized steel heat exchanger and a 12 year warranty on other components. (Limitations apply; see printed warranty or website for details)
FEATURES
- Induced Draft Blower—Designed specifically to work with the tubular heat exchanger, it pulls hot combustion gases through the exchanger until the burner cycles off; heated air is locked in while cold air is locked out
- In-Shot Burner—Engineered to deliver to most efficient air/gas mixture, it allows heat to be generated efficiently
- Tubular Heat Exchanger—The heart of the furnace, the heat exchanger is made of heavy gauge aluminized steel, and carries a 20-year warranty
- Hot Surface Igniter—Quiet and automatic, it eliminates the need for a standing pilot light for improved efficiency
- Multi-Speed Direct Drive Blower—Delivers warm, filtered air through the ductwork to each room and also covers a wide range of cooling capacities; switches on PCB make it easy to select motor speed
- Integrated Control Board—Combines all controls and functions into one board for easy installation, and is designed to accept options such as an electronic air cleaner.
Two heat exchangers make this one of the most efficient furnaces on the market today.
At only 34-1/2' in height, the furnace is ideal for renovations and replacements, fitting in virtually any space where a furnace was previously installed, including basements and utility closets.
The furnace comes assembled and prewired, with a color-coded wiring harness and quick connect fittings. An integrated control board simplifies hook-ups, and all components are easy to reach. Because of its small size, the furnace is easy to handle, fitting through doors, halls and stairways.
The front panel door is easy to remove to access the filter, encouraging regular filter replacement
The blower compartment has a sealed insulated door, while a sealed vestibule reduces burner and inducer sound levels for clean, efficient, quiet combustion.
The primary and secondary heat exchangers are covered by a limited lifetime warranty; other components are covered for 12 years. (Limitations apply; see Warranty for details.)
FEATURES
- Draft Inducer - Specifically designed for the tubular heat exchanger, it pulls hot combustion gases through the exchanger; heated air is locked in while cold air is locked out
- In-shot Burner - Engineered to provide the most efficient air/gas mixture for combustion, the design requires no manual adjustments to regulate the mix
- Primary Heat Exchanger - The patented tubular design is resistant to corrosion and thermal fatigue, and it is covered by a lifetime warranty
- Secondary Heat Exchanger - Unique heat recovery coil extracts additional heat, (which woud be lost by less efficient furnaces), stainless steel construction has a lifetime warranty
- Hot Surface Ignition - Silicon nitride type igniter is quiet and automatic, eliminating the need for a standing pilot light
- High Efficiency Blower - Three-speed blower delivers warm air throughout the house quietly and efficiently; direct drive system has no belts or pulleys to wear out
- Integrated Furnace Control - Controls are integrated into one board for fast, easy installation; features on-board diagnostics with easy to recognize fault codes
Our two stage furnace is designed for maximum convenience and optimum comfort. A conventional single stage furnace operates at high heat until the thermostat is satisfied, then shuts off until there's a demand for heat again. As a result the furnace is constantly cycling on and off. But with a two stage furnace, these temperature swings are virtually eliminated and your home stays at the comfort level you select.
Most of the time, a two stage furnace operates in the low stage, delivering a gentle yet steady flow of heated air. When the weather turns really cold, the furnace automatically shifts into the high stage, providing the extra heat needed to keep the home at the desired comfort level. Whenever the furnace is in the low stage, energy is saved because the burner flame is smaller and the blower fans runs at a slower speed. Even in the high stage, with AFUE rating of 95%, utility costs are being saved.
The ECM variable speed blower motor adjusts the blower speed to deliver the airflow required by the system, resulting in more even temperatures than a single speed motor can provide. And because air is constantly being drawn across the filter, indoor air quality and humidity control are enhanced.
The primary and secondary heat exchangers are covered by a limited lifetime warranty; other components are covered for 12 years. (Limitations apply; see 'Warranty' for details)
FEATURES
Conquest 80 Furnace Parts List
- Quiet Operation—Sealed door and cabinet insulation locks in heat and sound; sealed vertibule reduces burner and inducer sound levels; ECM blower motor makes this one of the quietest furnaces on the market
- Extraordinary Efficiency—Two heat exchangers deliver 95%+ of the heated air to the home; the ECM blower motor may give up to 1 SEER point gain in cooling efficiency
- ECM Blower Motor—Runs at a variety of speeds to match the load demand, for efficiency and quiet operation; constant airflow through a wide vareity of ductwork conditions reduces temperature stratification while improving indoor air quality
- Hot Surface Igniter—Silicon nitride type igniter is automatic, eliminating the need for a standing pilot light
- Designed for Long Life—Primary heat exchanger is made of heavy gauge aluminized steel and secondary heat exchanger is made of stainless steel; cabinet is steel with corosion resistant finish
- Thermostat—Can be used with either a single or two-stage thermostat; two stage is recommended for optimal efficiency (not included with furnace)