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Subject Author Date
Forced air heating problem jimwall2000 01-31-2008
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Posted by Bubba on February 2, 2008, 8:10 am
On Sat, 02 Feb 2008 03:39:33 GMT, "Dr. Hardcrab"

>Replace the thermostat 2 more times.
>
"Hey, Hey, Hey..........That's my line"
Bubba :-)

>Remember: 3rd time's a charm...
>
>
>> Hopefully someone here can give me some ideas on what might be wrong
>> with my Day and Night heater (about 10 years old). Every few days it
>> fails to come completely on and it flashes a Ignition Proving Failure
>> warning message. But the other 98% of the time it works perfectly.
>>
>> The details:
>> - It seems to do this in the early morning when it is changing from
>> the lower night setting to the higher day time setting.
>> - Removing power to the heater, waiting 5 minutes and turning it
>> back
>> on seems to always fix the problem (based on three to 5 times)
>> - The thermostat was replaced and did not fix the problem
>> - The sequence is: low speed fan comes on, electric igniter glows,
>> gas jets are ignited, a few seconds later the gas is shut off, error
>> message flashes, fan continues to run for a while, then the sequence
>> repeats.
>>
>>
>> Thanks for any ideas that I can try for myself.
>>
>>
>> -Jim
>>
>>

Posted by Dr. Hardcrab on February 2, 2008, 8:29 am

> On Sat, 02 Feb 2008 03:39:33 GMT, "Dr. Hardcrab"
>
>>Replace the thermostat 2 more times.
>>
> "Hey, Hey, Hey..........That's my line"
> Bubba :-)
>
>>Remember: 3rd time's a charm...
>>

Ooooops!

Damn! I'll add it to your monthly royalty check.....;-]


Posted by Tony Hwang on February 2, 2008, 9:07 pm
jimwall2000@yahoo.com wrote:

> Hopefully someone here can give me some ideas on what might be wrong
> with my Day and Night heater (about 10 years old). Every few days it
> fails to come completely on and it flashes a Ignition Proving Failure
> warning message. But the other 98% of the time it works perfectly.
>
> The details:
> - It seems to do this in the early morning when it is changing from
> the lower night setting to the higher day time setting.
> - Removing power to the heater, waiting 5 minutes and turning it
> back
> on seems to always fix the problem (based on three to 5 times)
> - The thermostat was replaced and did not fix the problem
> - The sequence is: low speed fan comes on, electric igniter glows,
> gas jets are ignited, a few seconds later the gas is shut off, error
> message flashes, fan continues to run for a while, then the sequence
> repeats.
>
>
> Thanks for any ideas that I can try for myself.
>
>
> -Jim
>
>
Hi,
Did you have a reasonable cause to replace the thermostat?
First, up front what is your furnace make and model?
Think logic. After ignition, it is time for the flame sensor to
tell the logic board the flame is on. So what do you think.
If all the logic flow is not correct step by step, furnace shuts off
for safety. When turn the power off/on, you are resetting the logic.
Or it'll reset itself after fixed number of hours.
BTW, no diagnostic code when it is acting up?

Posted by Zyp on February 2, 2008, 11:48 pm
Tony Hwang wrote:
> jimwall2000@yahoo.com wrote:
>
>> Hopefully someone here can give me some ideas on what might be wrong
>> with my Day and Night heater (about 10 years old). Every few days it
>> fails to come completely on and it flashes a Ignition Proving Failure
>> warning message. But the other 98% of the time it works perfectly.
>>
>> The details:
>> - It seems to do this in the early morning when it is changing from
>> the lower night setting to the higher day time setting.
>> - Removing power to the heater, waiting 5 minutes and turning it
>> back
>> on seems to always fix the problem (based on three to 5 times)
>> - The thermostat was replaced and did not fix the problem
>> - The sequence is: low speed fan comes on, electric igniter glows,
>> gas jets are ignited, a few seconds later the gas is shut off, error
>> message flashes, fan continues to run for a while, then the sequence
>> repeats.
>>
>>
>> Thanks for any ideas that I can try for myself.
>>
>>
>> -Jim
>>
>>
> Hi,
> Did you have a reasonable cause to replace the thermostat?
> First, up front what is your furnace make and model?
> Think logic. After ignition, it is time for the flame sensor to
> tell the logic board the flame is on. So what do you think.
> If all the logic flow is not correct step by step, furnace shuts off
> for safety. When turn the power off/on, you are resetting the logic.
> Or it'll reset itself after fixed number of hours.
> BTW, no diagnostic code when it is acting up?

That's it. Logic from someone who doesn't understand the english language.

--
Zyp



Posted by CJT on February 3, 2008, 7:55 pm
Zyp wrote:

<snip>
>
> That's it. Logic from someone who doesn't understand the english language.
>
That includes much of the U.S. population these days.

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

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