Gas and Oil Home Heating Furnaces - No Blower with Heater
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09-18-00, 12:51 PM
Just cool enough to try my Natural Gas forced air furnace. Everything seemed right but the blower never came on. Pilot was on, burner ignited, but blower just never started. Running AC and "Fan Only" runs just fine. Is this some kind of relay problem with the heater, or thermostat.
Help !
Help !
09-18-00, 07:56 PM
The problem is there is no blower on heating.
If you need the heat it is safe to turn the fan switch on the furnace to "fan On". This is a tempory solution and will get you safe heat.
There is a problem AT THE FURNACE.
The Heat blower is controled on an older furnace with a Fan and Limit Control, normally above the gas valve under the draft diverter. The round dial rotates as the furnace gets hotter, there are three pins. the lowest one turns the fan off, the middle on turns the fan on and the upper one turns the burners off if the furnace gets too hot.
Need to see if there is power from this switch.
There is also a relay in the furnace to isolate blower speeds. this relay (or circuit board could be bad.
The RED High Voltage Wire to the motor is not getting power. Bad wire connection, bad molenex connection or not connected at the relay or board correctly
If you need the heat it is safe to turn the fan switch on the furnace to "fan On". This is a tempory solution and will get you safe heat.
There is a problem AT THE FURNACE.
The Heat blower is controled on an older furnace with a Fan and Limit Control, normally above the gas valve under the draft diverter. The round dial rotates as the furnace gets hotter, there are three pins. the lowest one turns the fan off, the middle on turns the fan on and the upper one turns the burners off if the furnace gets too hot.
Need to see if there is power from this switch.
There is also a relay in the furnace to isolate blower speeds. this relay (or circuit board could be bad.
The RED High Voltage Wire to the motor is not getting power. Bad wire connection, bad molenex connection or not connected at the relay or board correctly