This is a 3 year old home. Tempstar furnace and ac unit with a White
Rogers thermostat.
Last night we noticed the unit blowing cold air. I found the Ac
running.The gas is cycling when the house temp falls below the set
limit. I pulled the breaker on the Ac to stop the compressor. The
blower still runs constantly with the gas cycling as required. Any
suggestions on additional trouble shooting. I'd like to narrow it down
either to the thermostat or the main unit.

i searched google groups, maybe warranty coverage, see:
http://groups.google.com/group/alt.h...24311297c49db6

wrote:

This is a 3 year old home. Tempstar furnace and ac unit with a White
Rogers thermostat.
Last night we noticed the unit blowing cold air. I found the Ac
running.The gas is cycling when the house temp falls below the set
limit. I pulled the breaker on the Ac to stop the compressor. The
blower still runs constantly with the gas cycling as required. Any
suggestions on additional trouble shooting. I'd like to narrow it down
either to the thermostat or the main unit.


The outside condenser blower or the inside furnace blower.
If the condenser blower motor is grounded it can run at a low speed
constantly.

Many things can cause the indoor blower to run constantly, --depends on
the furnace and the various blower control components.
Is the RM TH fan switch in the off position?
- udarrell

--
PROPER A/C UNIT & DUCT SIZING ESSENTIAL for EFFICIENCY & BTUH PERFORMANCE
http://www.udarrell.com/proper_cfm_b...syste ms.html

wrote:

This is a 3 year old home. Tempstar furnace and ac unit with a White
Rogers thermostat.
Last night we noticed the unit blowing cold air. I found the Ac
running.The gas is cycling when the house temp falls below the set
limit. I pulled the breaker on the Ac to stop the compressor. The
blower still runs constantly with the gas cycling as required. Any
suggestions on additional trouble shooting. I'd like to narrow it down
either to the thermostat or the main unit.

Disconnect the wires to the thermostat at the furnace (remembering where
each went), turn the breaker back on, and see if it's still running.

If not, it's either the thermostat or the wires to the thermostat.

If it is, then it's something internal to either the main unit or the
compressor (my guess would be the relay on the compressor is frozen).

Be careful.

--
The e-mail address in our reply-to line is reversed in an attempt to
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I doubt if the problem is in the outside unit, because the inside blower
keeps running, unless the thermostat fan setting is on.

"CJT" wrote in message
...
wrote:

This is a 3 year old home. Tempstar furnace and ac unit with a White
Rogers thermostat.
Last night we noticed the unit blowing cold air. I found the Ac
running.The gas is cycling when the house temp falls below the set
limit. I pulled the breaker on the Ac to stop the compressor. The
blower still runs constantly with the gas cycling as required. Any
suggestions on additional trouble shooting. I'd like to narrow it down
either to the thermostat or the main unit.

Disconnect the wires to the thermostat at the furnace (remembering where
each went), turn the breaker back on, and see if it's still running.

If not, it's either the thermostat or the wires to the thermostat.

If it is, then it's something internal to either the main unit or the
compressor (my guess would be the relay on the compressor is frozen).

Be careful.

--
The e-mail address in our reply-to line is reversed in an attempt to
minimize spam. Our true address is of the form .

Bob wrote:

I doubt if the problem is in the outside unit, because the inside blower
keeps running, unless the thermostat fan setting is on.

Good point. I missed that. :-)


"CJT" wrote in message
...

wrote:


This is a 3 year old home. Tempstar furnace and ac unit with a White
Rogers thermostat.
Last night we noticed the unit blowing cold air. I found the Ac
running.The gas is cycling when the house temp falls below the set
limit. I pulled the breaker on the Ac to stop the compressor. The
blower still runs constantly with the gas cycling as required. Any
suggestions on additional trouble shooting. I'd like to narrow it down
either to the thermostat or the main unit.


Disconnect the wires to the thermostat at the furnace (remembering where
each went), turn the breaker back on, and see if it's still running.

If not, it's either the thermostat or the wires to the thermostat.

If it is, then it's something internal to either the main unit or the
compressor (my guess would be the relay on the compressor is frozen).

Be careful.

--
The e-mail address in our reply-to line is reversed in an attempt to
minimize spam. Our true address is of the form .





--
The e-mail address in our reply-to line is reversed in an attempt to
minimize spam. Our true address is of the form .