Search found 4 matches

by frankk
Mon Nov 21, 2011 6:38 am
Forum: Coleman Service & Repair
Topic: Evcon Blower Motor Cycling - Thmstat On or Off
Replies: 6
Views: 4520

Re: Evcon Blower Motor Cycling - Thmstat On or Off

'Sounds like you're right. It was a defective board. Meaning: the 7990-319P factory-new replacement board was DEFECTIVE, such that your moderator Robert was correct in his related post that the 7990-319P is inherently defective and that the upgraded board, the 7990-320P, fixes the problem. Moreover,...
by frankk
Fri Nov 11, 2011 8:39 pm
Forum: Coleman Service & Repair
Topic: Evcon Blower Motor Cycling - Thmstat On or Off
Replies: 6
Views: 4520

Re: Evcon Blower Motor Cycling - Thmstat On or Off

Hi Mark, Thanks for the help. Since writing the above, I've replaced with new parts: (1) the lower limit switch, (2) upper limit switch, (3) booster assembly, (4) thermostat. I also cleaned the remote flame sensor. The problem still exists with the exact same behavior. I also disconnected the lower ...
by frankk
Wed Nov 02, 2011 12:58 am
Forum: Coleman Service & Repair
Topic: Evcon Blower Motor Cycling - Thmstat On or Off
Replies: 6
Views: 4520

Re: Evcon Blower Motor Cycling - Thmstat On or Off

Three more comments and a single question (please). (1) The original circuit board was the 7990-319P. The new replacement is also the 7990-319P (purchased from this site), not the 7990-320P. (2) Now when the t-stat calls for heat, the blower, from a constant-running-cycling state as described, STOPS...
by frankk
Tue Nov 01, 2011 11:54 pm
Forum: Coleman Service & Repair
Topic: Evcon Blower Motor Cycling - Thmstat On or Off
Replies: 6
Views: 4520

Evcon Blower Motor Cycling - Thmstat On or Off

Hello. I have a 15 year old Evcon DGAM075BDD furnace with A/C. The circuit board took a lighting hit. I replaced the circuit board and transformer with new. Now, at any thermostat setting, including "off", blower fan will come on for 3-4 minutes, then off 30 seconds, then on 3-4 minutes, e...