No heat from a Coleman 3400-815 electric furnace

Questions about repairs and parts for Coleman furnaces, air conditioners and heat pumps for manufactured homes. Click here for Coleman parts.

Moderators: ponch37300, Mark, flcruising, Greg

No heat from a Coleman 3400-815 electric furnace

Postby archive » Sun Feb 18, 2007 11:32 pm

I have a Coleman 3400-815 electric furnace. The blower is running but there is no heat. I've checked the pull-out fuse component which appears to be okay. I've cycled the breaker, as well as, moving the blower switch from "auto" to "on". There is still no heat coming from the system. Any ideas? Any and all help is appreciated.

gdl
archive
 
Posts: 1054
Joined: Sun Feb 18, 2007 3:24 pm

Postby archive » Sun Feb 18, 2007 11:32 pm

It could be that your heating elements have failed or more likely your heat sequencer is defective.

hvac1000
archive
 
Posts: 1054
Joined: Sun Feb 18, 2007 3:24 pm

Postby archive » Sun Feb 18, 2007 11:35 pm

Hi,

If you have an electrical meter, test across each element (one meter lead touching terminal at each end of element) for 240+vac.

With t-stat calling for Heat, after 2 minutes, you should read 240 vac across each element.

IF you don't, then most likely a bad Sequencer. If you do, further testing of element is needed.

On the Sequencer, the top and middle silver terminals are the M terminals......M1/M2, M3/M4, M5/M6.

The bottom brass terminals are the H terminals.....H1/H2, H3/H4 .

When t-stat calls for Heat, you should read 24-28vac across the H terminals (bottom brass).

IF you have 24-28vac at those, then you should read 0 vac across all the M terminals AFTER 2 minutes.

IF you read 240+vac across any of the sets of M terminals, the Sequencer is bad.

The Sequencer can be seen and ordered at below link if needed.

It is Sequencer # 3115-3571 @ $39.99 + $6 shipping.

Please note that heating elements for the 3400 series electric furnaces are no longer available. Restring kits are available to repair your existing heating elements.

Link: http://www.mobilehomerepair.com/ColemanElec.html

Take care and best wishes,
Robert
archive
 
Posts: 1054
Joined: Sun Feb 18, 2007 3:24 pm


Return to Coleman Service & Repair

Who is online

Users browsing this forum: No registered users and 0 guests