I have found that some times it is no more than a little corrosion on the contacts on the control board. I would suggest that you try unplugging and re inserting each of the several plugins on the control board several times. This will wipe the contacts clean if in fact that is the problem. Dust on the control board can also cause problems as well.
Flat_Land Dale
Douglas sparks06524@yahoo.com [DoIt_Yourself] wrote:
Are you saying that the blower stays on AFTER a heating cycle has completed when the burner goes off?
If so, it almost has to be the main control circuit board. Almost ALL furnaces built within the last 20 years have such a circuit board. New ones can often be obtained on eBay for $75 to $150 dollars. Go on eBay with your furnace's make and model number. Obviously a local HVAC can also obtain for you, at about double the price. Unlike older furnaces where the blower was controlled by a simple thermostatic fan switch mounted on the furnace's heat exchanger, furnaces such as yours use the circuit board to electronically time the fan cycle. The circuit board also has other functions such as turning on the main gas valve and keeping it on after the flame sensor has "proved" ignition.
While another poster was correct when he stated that you should look for an error code in the diagnostic light, such an internal circuit board fault may not show up as an error code.
Good luck!
Doug
 | Virus-free. www.avast.com |
__._,_.___
Posted by: Dale Schoepflin <dalu@hbcomm.net>
| Reply via web post | • | Reply to sender | • | Reply to group | • | Start a New Topic | • | Messages in this topic (6) |
Have you tried the highest rated email app?
With 4.5 stars in iTunes, the Yahoo Mail app is the highest rated email app on the market. What are you waiting for? Now you can access all your inboxes (Gmail, Outlook, AOL and more) in one place. Never delete an email again with 1000GB of free cloud storage.
Please send decorating questions to Interior Motives List - to subscribe send an email to: Interior_Motives-subscribe@yahoogroups.com
.
__,_._,___
No comments:
Post a Comment