Following up on my register temperature issue yesterday.

A couple of people have suggested to look at blower speed. Mine is set
to, "Don't stand near the cold air ducts, you'll get sucked in!" That
is, the fan seems to be running at high speed when the furnace is
running.

I can find no fan speed control, either on the unit itself or at the
thermostat. The only fan controls are at the thermostat and those
consist of two selections, AUTO and ON.

I realize that the fan controls may be in different places for
different units, and I apologize for not being able to provide an exact
model number, but what would be the telltale signs of a fan speed
control? What would one look like? As I said, there is nothing either
on or in the unit that is so obvious as to say "Fan Speed Lo Hi Off."
There's a gas valve behind the access panel. That's it.

wrote:
Following up on my register temperature issue yesterday.

A couple of people have suggested to look at blower speed. Mine is set
to, "Don't stand near the cold air ducts, you'll get sucked in!" That
is, the fan seems to be running at high speed when the furnace is
running.

I can find no fan speed control, either on the unit itself or at the
thermostat. The only fan controls are at the thermostat and those
consist of two selections, AUTO and ON.

I realize that the fan controls may be in different places for
different units, and I apologize for not being able to provide an exact
model number, but what would be the telltale signs of a fan speed
control? What would one look like? As I said, there is nothing either
on or in the unit that is so obvious as to say "Fan Speed Lo Hi Off."
There's a gas valve behind the access panel. That's it.

Many (most?, all?) require rewiring the
blower in the control area,
if it is indeed a multi-speed blower
motor. There is usually a common
lead and leads for each of the available
speeds, usually 3 or 4. Sometimes,
if there is heat and AC, it can be wired
for different speeds for each.
Obviously not a job for the typical
homeowner.

wrote:
Following up on my register temperature issue yesterday.

A couple of people have suggested to look at blower speed. Mine is set
to, "Don't stand near the cold air ducts, you'll get sucked in!" That
is, the fan seems to be running at high speed when the furnace is
running.

I can find no fan speed control, either on the unit itself or at the
thermostat.

As Art noted, the motor probably has a number of leads brought out
for the various speeds. They will be color-coded.

Look on the door panel or inside the furnace for a wiring diagram
which will show the connections.

Jim

wrote in message
oups.com...
Following up on my register temperature issue yesterday.

A couple of people have suggested to look at blower speed. Mine is set
to, "Don't stand near the cold air ducts, you'll get sucked in!" That
is, the fan seems to be running at high speed when the furnace is
running.

I can find no fan speed control, either on the unit itself or at the
thermostat. The only fan controls are at the thermostat and those
consist of two selections, AUTO and ON.

I realize that the fan controls may be in different places for
different units, and I apologize for not being able to provide an exact
model number, but what would be the telltale signs of a fan speed
control? What would one look like? As I said, there is nothing either
on or in the unit that is so obvious as to say "Fan Speed Lo Hi Off."
There's a gas valve behind the access panel. That's it.

If there's no electrical way to change the blower speed, it can be done by
changing belt and pulley sizes (assuming a belt drive arrangement). That's
usually a job for a furnace technician, however.

TKM