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Subject Author Date
circuit boards Moe Jones 01-08-2008
---> Re: circuit boards Jeffry Lebowski01-09-2008
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Posted by Moe Jones on January 8, 2008, 5:56 pm
Can anyone tell me what year that gas furnaces began using solid circuit
boards?



Also a lot of today's circuit boards will allow the blower motor run after
the system shuts down. Can you tell me for how long it will allow the blower
to run?


--
Moe Jones
HVAC Service Technician
Energy Equalizers Inc.
Houston, Texas
www.EnergyEqualizers.com

We Sell Lead Free A/Cs :)




Posted by Dr. Hardcrab on January 8, 2008, 6:02 pm

> Can anyone tell me what year that gas furnaces began using solid circuit
> boards?

25 years?

>
>
>
> Also a lot of today's circuit boards will allow the blower motor run after
> the system shuts down. Can you tell me for how long it will allow the
> blower
> to run?

Depends on the board. Some you can adjust to various runs....
>
>
> --
> Moe Jones
> HVAC Service Technician
> Energy Equalizers Inc.
> Houston, Texas
> www.EnergyEqualizers.com
>
> We Sell Lead Free A/Cs :)
>
>
>


Posted by jamesgangnc on January 8, 2008, 8:21 pm
Depends on the brand. 20 to 30 years I'd guess.

Generally somewhere between 30 seconds and a couple minutes. Some are
adjustable. Before circuit boards some still did this but just with a
delayed release relay. You can still buy them.

> Can anyone tell me what year that gas furnaces began using solid circuit
> boards?
>
>
>
> Also a lot of today's circuit boards will allow the blower motor run after
> the system shuts down. Can you tell me for how long it will allow the
> blower
> to run?
>
>
> --
> Moe Jones
> HVAC Service Technician
> Energy Equalizers Inc.
> Houston, Texas
> www.EnergyEqualizers.com
>
> We Sell Lead Free A/Cs :)
>
>
>



Posted by Jeffry Lebowski on January 9, 2008, 12:06 am


>
> Can anyone tell me what year that gas furnaces began using solid circuit
> boards?
>

1968...before that time all gas furnaces all used liquid circuit boards.

--




Posted by CJT on January 9, 2008, 12:19 am
Jeffry Lebowski wrote:

>
>
>>Can anyone tell me what year that gas furnaces began using solid circuit
>>boards?
>>
>
>
> 1968...before that time all gas furnaces all used liquid circuit boards.
>
> --
>
>
>
Not gas??

--
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Page 1 of 3       1 2 3 > last >>
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