Furnace blower.

[Jococa]

My furnace starts up as it should when it first calls for heat. But when furnace is done heating everything shuts off except blower. Blower continues to run after cool down and never stops until I manually shut it off via the switch on the side of the actual blower. That resets it and it will start up normally again when called for heat but again. After heat cycle is done everything shuts off except blower?  Any ideas?

 

[lynnmor]

You might want to post the make and model  of the furnace.  You can also search for troubleshooting that model.

That said, my guess is that you have a faulty time delay relay.

 

[Gary RV_Wizard]

On relatively recent furnaces that is typically a circuit board problem, but old, old model furnaces had an actual delay device that kept the fan running for a while. Tell us more about what make & model furnace you have.  Or get the service manual at  http://bryantrv.com/docs.html#furnace

 

[Jococa]

Looks to be an Atwood mobile products
Model 8525-oc-dclp
It?s a 2002 skyline nomad scout.

 

[Jococa]

Model 8525-iv-dclp

 

[Old_Crow]

I have a model 8535-iv.  Same furnace, just higher output.  It has the delay relay Gary spoke of.  I replaced mine with a Dinosaur brand relay.

https://www.rvautoparts.com/12VDCTDR-Dinosaur-Electric-Furnace-Time-Delay-Relay-Replacement-For_p_289714.html?gclid=EAIaIQobChMI5qy0q9C04wIVjYCfCh3sgwX9EAQYAyABEgIg9fD_BwE

 

[Jococa]

So I cannot seem to find a time delay relay on this particular unit. It has tha switch and 10amp circuit and the relay should be next to those?  So I?m assuming it is on the mother board now?

 

[Old_Crow]

Here's a link to the manual for the furnace.  Check out the wiring diagrams on page 10

http://bryantrv.com/docs2/docs/hflamefurn04.pdf

 

[Gary RV_Wizard]

Yes, later years eliminated the relay component and do the delay timing via the circuit board.