normal furnace operation?
Got a new thermopride oil burning hot air furnace a few months ago.
What I'm wondering about is... after the thermostat shuts off and the burner shuts off and the blower shuts off, ten or 15 minutes later the blower comes on again for maybe a minute with no burner, then shuts down again. Is this normal? Is this good, bad, or indifferent? I have two random hypotheses: 1 is that it is deliberate in order to scavenge that last few btus of retained heat that would otherwise be wasted; 2 is that in the absence of cooling by the blower the residual heat-soak is pushing the temp at the thermal switch up to the point where it gets hot enough to turn the blower on again for a while. (I know it sounds weird, but if the thermal switch isn't that closely tied to the hottest part of the thing it could happen; like with some cars where you get off the highway and immediately turn it off, and in the absence of the highway airflow cooling the radiator the residual engine heat soaking into the coolant gets the water temp up to where the thermal switch turns the electric fan on after a minute) |
normal furnace operation?
Normal. And very common. Your #2 looked close, but I didn't
read closely. Nothing to be concerned about as long as the temps remain comfortable in your house. Please post in "text only" mode. HTML draws flames a lot of times; posts get garbaged on many readers. HTH, Pop "z" wrote in message oups.com... : Got a new thermopride oil burning hot air furnace a few months ago. : What I'm wondering about is... : after the thermostat shuts off and the burner shuts off and the blower : shuts off, ten or 15 minutes later the blower comes on again for maybe : a minute with no burner, then shuts down again. Is this normal? Is this : good, bad, or indifferent? : I have two random hypotheses: : 1 is that it is deliberate in order to scavenge that last few btus of : retained heat that would otherwise be wasted; : 2 is that in the absence of cooling by the blower the residual : heat-soak is pushing the temp at the thermal switch up to the point : where it gets hot enough to turn the blower on again for a while. (I : know it sounds weird, but if the thermal switch isn't that closely tied : to the hottest part of the thing it could happen; like with some cars : where you get off the highway and immediately turn it off, and in the : absence of the highway airflow cooling the radiator the residual engine : heat soaking into the coolant gets the water temp up to where the : thermal switch turns the electric fan on after a minute) : |
normal furnace operation?
Sounds like your limit could use some adjusting. It won't hurt anything as
is but shouldn't really run that way.... Nice furnace, BTW...... "z" wrote in message oups.com... Got a new thermopride oil burning hot air furnace a few months ago. What I'm wondering about is... after the thermostat shuts off and the burner shuts off and the blower shuts off, ten or 15 minutes later the blower comes on again for maybe a minute with no burner, then shuts down again. Is this normal? Is this good, bad, or indifferent? I have two random hypotheses: 1 is that it is deliberate in order to scavenge that last few btus of retained heat that would otherwise be wasted; 2 is that in the absence of cooling by the blower the residual heat-soak is pushing the temp at the thermal switch up to the point where it gets hot enough to turn the blower on again for a while. (I know it sounds weird, but if the thermal switch isn't that closely tied to the hottest part of the thing it could happen; like with some cars where you get off the highway and immediately turn it off, and in the absence of the highway airflow cooling the radiator the residual engine heat soaking into the coolant gets the water temp up to where the thermal switch turns the electric fan on after a minute) |
normal furnace operation?
On 16 Dec 2005 11:29:31 -0800, "z" wrote:
Got a new thermopride oil burning hot air furnace a few months ago. What I'm wondering about is... after the thermostat shuts off and the burner shuts off and the blower shuts off, ten or 15 minutes later the blower comes on again for maybe a minute with no burner, then shuts down again. Is this normal? Is this good, bad, or indifferent? I have two random hypotheses: 1 is that it is deliberate in order to scavenge that last few btus of retained heat that would otherwise be wasted; 2 is that in the absence of cooling by the blower the residual heat-soak is pushing the temp at the thermal switch up to the point where it gets hot enough to turn the blower on again for a while. (I know it sounds weird, but if the thermal switch isn't that closely tied to the hottest part of the thing it could happen; like with some cars where you get off the highway and immediately turn it off, and in the absence of the highway airflow cooling the radiator the residual engine heat soaking into the coolant gets the water temp up to where the thermal switch turns the electric fan on after a minute) The fan side of your fan & limit control needs to have the "off" setting lowered just a bit. Bubba |
normal furnace operation?
"z" wrote in message oups.com... Got a new thermopride oil burning hot air furnace a few months ago. What I'm wondering about is... after the thermostat shuts off and the burner shuts off and the blower shuts off, ten or 15 minutes later the blower comes on again for maybe a minute with no burner, then shuts down again. Is this normal? Is this good, bad, or indifferent? I have two random hypotheses: 1 is that it is deliberate in order to scavenge that last few btus of retained heat that would otherwise be wasted; 2 is that in the absence of cooling by the blower the residual heat-soak is pushing the temp at the thermal switch up to the point where it gets hot enough to turn the blower on again for a while. (I know it sounds weird, but if the thermal switch isn't that closely tied to the hottest part of the thing it could happen; like with some cars where you get off the highway and immediately turn it off, and in the absence of the highway airflow cooling the radiator the residual engine heat soaking into the coolant gets the water temp up to where the thermal switch turns the electric fan on after a minute) Its common, not correct however. the limits off temps too high. |
normal furnace operation?
Pop wrote: Normal. And very common. Your #2 looked close, but I didn't read closely. Nothing to be concerned about as long as the temps remain comfortable in your house. Please post in "text only" mode. HTML draws flames a lot of times; posts get garbaged on many readers. Thanks. (it should be in text; I'm posting via google groups and they're text only. ??) |
normal furnace operation?
the fan "off" temp needs to be lowered but do not lower it
below 98.6 as that is body temp and any thing lower below that will fee cold or cool. "z" wrote in message oups.com.. .. Pop wrote: Normal. And very common. Your #2 looked close, but I didn't read closely. Nothing to be concerned about as long as the temps remain comfortable in your house. Please post in "text only" mode. HTML draws flames a lot of times; posts get garbaged on many readers. Thanks. (it should be in text; I'm posting via google groups and they're text only. ??) |
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