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Lennox Heater Fan Update.. JD 04-16-2007
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Posted by JD on April 16, 2007, 9:20 am
Let me apologize for the wording of my original message.

I thought it was odd that the fan would malfunction the first time the
heater came on in the morning but would then function properly after that.

I did go into the heater and found a small amount of spider web and what
looks to be a analog switch with a circular dial with the words Fan
Limit on it's face.

I gently vacuumed up the spider web and two dead spiders and then used
my canned air to blow around and into the Fan Limit switch.

This morning, the heater fan worked as it did three days ago.

--
JD..

Posted by Zephyr on April 16, 2007, 11:40 am
JD

It is unlikely that a "spider web" interfered with the Fan / Limit control.
I think the Honeywell control may be weakening as time has passed and is a
little sticky. It is a helical coil type sensor and they will overtime
become less and less effective. Instead of wishing for it to 'fix' itself,
why not get a qualified HVAC service person out there, and replace the
control. They're really not that expensive. Your fan will not run
unnecessarily and you won't burn up the furnace by messing with the limit
part of the control. Oh, and replace the air filter more often.
Insufficient air can cause premature control failure.

--
Zyp

> Let me apologize for the wording of my original message.
>
> I thought it was odd that the fan would malfunction the first time the
> heater came on in the morning but would then function properly after that.
>
> I did go into the heater and found a small amount of spider web and what
> looks to be a analog switch with a circular dial with the words Fan
> Limit on it's face.
>
> I gently vacuumed up the spider web and two dead spiders and then used
> my canned air to blow around and into the Fan Limit switch.
>
> This morning, the heater fan worked as it did three days ago.
>
> --
> JD..



Posted by JD on April 16, 2007, 12:13 pm
Zephyr wrote:
> JD
>
> It is unlikely that a "spider web" interfered with the Fan / Limit control.
> I think the Honeywell control may be weakening as time has passed and is a
> little sticky. It is a helical coil type sensor and they will overtime
> become less and less effective. Instead of wishing for it to 'fix' itself,
> why not get a qualified HVAC service person out there, and replace the
> control. They're really not that expensive. Your fan will not run
> unnecessarily and you won't burn up the furnace by messing with the limit
> part of the control. Oh, and replace the air filter more often.
> Insufficient air can cause premature control failure.
>

Thank you. I will continue to study the situation and take the
appropriate action.

Aprilaire air filter is checked monthly and replaced when it is dirty.

--
JD..

Posted by on April 16, 2007, 4:01 pm

> Let me apologize for the wording of my original message.
>
> I thought it was odd that the fan would malfunction the first time the
> heater came on in the morning but would then function properly after that.
>
> I did go into the heater and found a small amount of spider web and what
> looks to be a analog switch with a circular dial with the words Fan
> Limit on it's face.
>
> I gently vacuumed up the spider web and two dead spiders and then used
> my canned air to blow around and into the Fan Limit switch.
>
> This morning, the heater fan worked as it did three days ago.
>
> --
> JD..


Canned air....

HAhahahaha...

You ACTUALLY *think* you fixed it. LOL




Posted by Bubba on April 16, 2007, 4:29 pm

>
>> Let me apologize for the wording of my original message.
>>
>> I thought it was odd that the fan would malfunction the first time the
>> heater came on in the morning but would then function properly after that.
>>
>> I did go into the heater and found a small amount of spider web and what
>> looks to be a analog switch with a circular dial with the words Fan
>> Limit on it's face.
>>
>> I gently vacuumed up the spider web and two dead spiders and then used
>> my canned air to blow around and into the Fan Limit switch.
>>
>> This morning, the heater fan worked as it did three days ago.
>>
>> --
>> JD..
>
>
>Canned air....
(short for "Blow-Job")
>
>HAhahahaha...
>
>You ACTUALLY *think* you fixed it. LOL
>
>

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