yes
does you furnace have this control
if so take off the cover and watch it se if it moves right. watch it from cold. pull it out and look at it see if there is and buildup on it.
(broken link removed)
Oil Furnace Short Cycling, Honeywell R7284 Control
- Thread starter JRP3
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does you furnace have this control
if so take off the cover and watch it se if it moves right. watch it from cold. pull it out and look at it see if there is and buildup on it.
(broken link removed)
No, doesn't have that. The furnace is this unit (broken link removed to https://www.lennoxpros.com/of23q34-105120-furn-oil120kb3-4ton/p/26K75)
This is what it looks like in the burner area
![[Hearth.com] Oil Furnace Short Cycling, Honeywell R7284 Control](https://www.hearth.com/talk/data/attachments/217/217420-50f9a90a46d0e671f9e915f6cfa01a12.jpg?hash=NOoCPfDkh9 "[Hearth.com] Oil Furnace Short Cycling, Honeywell R7284 Control")
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Unfortunately Lennox does not make it's manuals and schematics easily available.
Is the blower coming on a little bit after the furnace comes on?
Has the filter been checked?
Has the burner photocell been checked to see if it is dirty?
Is there a low fire pressure switch in the system and if yes, has it been checked?
Is the blower coming on a little bit after the furnace comes on?
Has the filter been checked?
Has the burner photocell been checked to see if it is dirty?
Is there a low fire pressure switch in the system and if yes, has it been checked?
When the furnace first fires up the burner runs, then the fan comes on, and the fan stays running as the burner cycles on and off, until temperature is reached. The cad cell readout hovers around 200 ohms when running, which is the normal range from what I can tell.
By filter do you mean the air filter or oil filter? I looked at the air filter today and it seems to be clean. I don't know about a low fire pressure switch.
I did take the cover off that covers the circuit board and noticed some slight burning on the board near a ceramic resistor. I think after the weekend I'm just going to call the pros and let them deal with it.
By filter do you mean the air filter or oil filter? I looked at the air filter today and it seems to be clean. I don't know about a low fire pressure switch.
I did take the cover off that covers the circuit board and noticed some slight burning on the board near a ceramic resistor. I think after the weekend I'm just going to call the pros and let them deal with it.
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