Question about Carrier 52PQ-515---3 Premier Series Heat Pump, 15000BTUH, 5.0KW, 230V PTAC Air Conditioner

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My furnace turns on but there is no air blowing out of registers

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Hello,

you can have a burnt wire,burnt heat strips,relay,sequencer,or all of the above,if you are not comfortable with going into the business end of your furnace then you need to call a service tech out to repair it,don't let them talk you into replacing the entire unit,if you want to do it your self then remove the panel and check the wiring,most of the time a burnt wire will show itself soon as you remove the panel,make sure you cut the power to it before doing this.

Take care.

Posted on Jul 06, 2010

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Home furnace comfortmaker blowing cold air


Home owner's manual? Troubleshooting section. Gas or electric?
If gas, pilot light may be out, or other gas controls. Are you sure you have gas supply? Do you have other Gas appliances so you can check? Furnace needs power for controls, fan and thermostat. Are you sure you have electric power to the furnace? Does the thermostat have a fan switch? If so turn it on and see if the fan turns on. If it does not turn on you may have a circut breaker poped. or some other reason power to the furnace is not working.

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1 Answer

Furnace blowing cold air


Turn power off & on again. Watch to see if it cycles...it could be the hot surface igniter if you don't see it turn bright orange. If it goes straight to blowing cold air, then normally it is a limit switch open- mostly manual reset - thermal disc-located around flame rollout.

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Gas Furnace Model GMH 95070, installed May 09. Air flow from registers noisy. Installer reduced it one level -still noisy. Said it cound not be cut lower because it would get to hot due to slow air flow. I...


Seems to me, the problem is not with gas, it's with the size of the duct work. 4" diameter is way to small if the entire duct work system is only 4". The trunk line may have not been sized proper,y. so the volume of heat has now been translated into high pressure, which is why the registers are noisy.
Also 6" ducts coming off a larger trunk line to each register is the norm for 1000 sq ft home.
Also, are your registers in the floor or the ceiling? Ceiling registers historically are a little noisier than floor registers. Mainly because, they're overhead and closer to your ears. But, if they were up-sized to 6", the noise would decrease quite a bit.

Hope this helps.

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1 Answer

Our Armstron (magic Chief) oil furnace keeps shutting on and off during the heating cycle.


I will try to help, but a little more info would be great, when you say it shuts off, it is important to determine if it is the burner or the blower that is shutting off.
If the burner is shutting off and coming back on, the safety "fan and limit" control is getting to hot,,
If what I have listed above, there are several things that can cause it;
1. The first step is to make sure that the air filters are clean, the return air grills are clear, no objects covering them.
2. This part needs to be approached with care, Turning off power to the furnace is a must; then clean the blower area, and if it is a belt driven blower setup, inspect the belt, looking for cracks on the surface that makes contact with the pulleys. If the belt is old, it may be stretched and slipping on the pulleys, reducing the air that is being blown across the furnaces firebox, this will cause the furnaces safety "fan and limit" control to over heat and shut off till it cools off, then it will turn back on.

If the blower is the one that is shutting on and off, you would notice this at the supply registers in each room, air blows, then stops. This usually caused by really cold air blowing across the firebox, like after the house has been cold - over night, and usually will start operating more along the normal side of things as the home warms up.
Either the blower is moving to much air, blowing strongly in each room, or the furnace has been reducein it's firing rate - derated - a smaller nozzle being installed would be the main cause.... this is the first thing to check,,, if that doesn't do it, it would be highly recommended to have a experienced repair person look at it.
Remember when working in the blower area, please turn off the power to the furnace to save the fingers.
I hope this will give you a game plan.
Have a great evening.
Sincerely,
Paul Gibson

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1 Answer

Furnace will not blow hot or shut off


The furnace has a fault check the furnace compartment for a flash code and check it with the code chart on the furnace door. Turning the power off to the furnace and turning it back on will reset the fault but it may happen again till you verify the fault and fix it.

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1 Answer

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1 Answer

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This is a common problem when the furnace register is located in or near the kitchen. You will need to close the register(located in the ceiling) or adjust it so the air is not blowing toward the range burners. They also make deflectors that you can install on the register to direct the air away from the range.

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2 Answers

Gas furnace is constantly blowing cold air


An indoor blower running when it is not supposed to usually indicates an overheat condition. I would guess that it has been cycling on and off for some time and finally caused the high limit to stick and not auto reset. if you tap it sometimes they reset. the real problem is that it has been overheating from lack of airflow, over sized unit, not enough return air, too many closed registers, dirty filter, dirty squirrel cage blower and or air conditioner a-coil. If you get it started again sit and watch the unit run the flames should come on and stay on for the entire heating cycle, not going on and off.
I wish I could help you more but it is difficult without seeing the problem myself. Good luck! this should get you started!

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