message We installed GMEC961005CN on 12/15/20. It's working ok but there are a couple of issues. As soon as the flame shuts off, the blower motor shuts off as well although the furnace itself and ductwork are still hot. It is supposed to stay on for 2-3 min after the flame shuts off according to the manual. I have noticed blower motor stay on after 2nd stage heat but not after 1st stage. Also, I noticed the furnace starts right after 4-5 minutes once it shuts off. Usually, there is a 15-20 min gap in each cycle. Also, after the flame ignites, the blower makes a loud sound like running on high speed when it first starts and then it goes to low speed and becomes quieter. If it starts and stays quiet from the beginning , it would be nice. We would like it to run at medium speed instead of low speed on the 1st stage if possible. Looks like a low speed blower doesn't circulate warm air that efficiently. Also, do we need a 2 stage thermostat or can we get by with a single stage thermostat?
I'm not a pro but it sounds like you may be tripping the limit switch. The furnace is heating up to high and it's shutting off the flame. I'm not sure if it should also kill the blower but this is what is sounds like. Outside of that, there should be a dip switch that can be set to determine how long the blower motor keeps running. You can have a look at that setting. Fan starting high and then lowering. My previous furnace did this as well and it stayed in service for 15 years. As for the thermostat. Again, there should be a setting to tell the furnace when to kick on the second stage if you only have a single stage thermostat. Though it is usually best to have a 2 stage thermostat as it will know where you want the heat to be vs where it is now. Then the thermostat can determine if is should call for the 2nd stage or not. The furnace will not know what the temperature is in the house. All it will know is that there's a call for heat. After a set period (that you will do with the dip/jumper switches) it will switch to the 2nd stage after the elapsed time. You can tell the furnace to switch to 2nd stage fairly quickly or have it wait for quite a while. The downside to this is since it doesn't know what the temp is in the house you may only need to raise the temp 2 degrees. If you have it going to 2nd stage fairly quickly then it can kick in the send stage minutes before it reaches the desired temp. While on the other hand you could be turning on the furnace for the first time that morning. The temp in the house could be setting at 65 degrees and you want it to be at 73. If you set the dip swich/jumper to wait for 20 minutes before going to second stage then you'll need to wait that 20 minutes before the furnace starts putting out the max heat that it can. The 2 stage thermostat will know from the start that it has quite a while to go to get up to the desired temp and will immediately call for 2nd stage heat from the start in the last case I mentioned. While in the first case it will know that it's close to reaching the desired temp and won't bother to turn on the 2nd stage. Both options will work. The 2 stage thermostat however will work better.
Just got a 2-stage installed. Thanks for making me feel great about the purchase. Yeah buddy.
LMFAO the end of this video is just pure gold
Yeah buddy!
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We installed GMEC961005CN on 12/15/20. It's working ok but there are a couple of issues. As soon as the flame shuts off, the blower motor shuts off as well although the furnace itself and ductwork are still hot. It is supposed to stay on for 2-3 min after the flame shuts off according to the manual. I have noticed blower motor stay on after 2nd stage heat but not after 1st stage. Also, I noticed the furnace starts right after 4-5 minutes once it shuts off. Usually, there is a 15-20 min gap in each cycle.
Also, after the flame ignites, the blower makes a loud sound like running on high speed when it first starts and then it goes to low speed and becomes quieter. If it starts and stays quiet from the beginning , it would be nice. We would like it to run at medium speed instead of low speed on the 1st stage if possible. Looks like a low speed blower doesn't circulate warm air that efficiently.
Also, do we need a 2 stage thermostat or can we get by with a single stage thermostat?
I'm not a pro but it sounds like you may be tripping the limit switch. The furnace is heating up to high and it's shutting off the flame. I'm not sure if it should also kill the blower but this is what is sounds like.
Outside of that, there should be a dip switch that can be set to determine how long the blower motor keeps running. You can have a look at that setting.
Fan starting high and then lowering. My previous furnace did this as well and it stayed in service for 15 years.
As for the thermostat. Again, there should be a setting to tell the furnace when to kick on the second stage if you only have a single stage thermostat. Though it is usually best to have a 2 stage thermostat as it will know where you want the heat to be vs where it is now. Then the thermostat can determine if is should call for the 2nd stage or not. The furnace will not know what the temperature is in the house. All it will know is that there's a call for heat. After a set period (that you will do with the dip/jumper switches) it will switch to the 2nd stage after the elapsed time.
You can tell the furnace to switch to 2nd stage fairly quickly or have it wait for quite a while.
The downside to this is since it doesn't know what the temp is in the house you may only need to raise the temp 2 degrees. If you have it going to 2nd stage fairly quickly then it can kick in the send stage minutes before it reaches the desired temp.
While on the other hand you could be turning on the furnace for the first time that morning. The temp in the house could be setting at 65 degrees and you want it to be at 73. If you set the dip swich/jumper to wait for 20 minutes before going to second stage then you'll need to wait that 20 minutes before the furnace starts putting out the max heat that it can.
The 2 stage thermostat will know from the start that it has quite a while to go to get up to the desired temp and will immediately call for 2nd stage heat from the start in the last case I mentioned. While in the first case it will know that it's close to reaching the desired temp and won't bother to turn on the 2nd stage.
Both options will work. The 2 stage thermostat however will work better.