On Tue, 4 Mar 2008 05:35:53 -0800 (PST), wrote:

On Mar 4, 12:28*am, wrote:
On Tue, 19 Feb 2008 13:04:02 -0800 (PST), wrote:
My Amama 115,000 btu forced air system (1987) with White-Rodgers
controller is not reaching its thermostat setting. *My thermostat is a
Honeywell set-back model. *The furnace has a particular problem in the
morning to raise the temperature from the low temperature that is used
at night.

1. Thermostat calls for heat.
2. Induced Draft motor starts
3. Furnace makes a clicking noise and ignitor turns on
4. Blower turns on.
5. High temperature limit turns off burners (after 4 minutes)
6. Ignitor turns on
7. Gas lights and stays on for about (4 minutes)
8. Furnace turns off without reaching thermostat setting

I can shut the power off to reset the furnace and it will light off
again for about 15 minutes again. *I have changed the Flame senor to
be sure that it is not causing the problem.

Is there anything anyone has to offer on what might be tripping the
furnace?

It's *the thermostat. *Go to Home Depot get a new one and your good to
go.


Please explain how a bad thermostat results in the furnace high limit
control shutting down the furnace?

Email and I can go over the details. Alot of techs miss this and
blame the limit.



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Click here every day to feed an animal that needs you today !!!
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Paul ( pjm @ pobox . com ) - remove spaces to email me
'Some days, it's just not worth chewing through the restraints.'
'With sufficient thrust, pigs fly just fine.'
HVAC/R program for Palm PDA's
Free demo now available online http://pmilligan.net/palm/