We have a Coleman Evcon DLAS075BDD furnace which keeps displaying error codes: 1-Ignition Failure and 4-Limit cycling. We have replaced the circuit board. Inspected the ignitor and the flame sensor and both appear good. Also have taken the exhaust vent/hood off and vaccuumed out any rust to ensure it is clear. After performing these measures it still showing a 4-limit cylcing error. This error seems to be happening most often when it is windy. Do I need to extend or replace the vent cap? Very frustrated normally able to troubleshoot problems. Any suggestions would be helpful...

Read the recall according to your posted model number.

http://www.doacs.state.fl.us/standard/lpgas/Download/CPSC%20RECALLS%20OF%20GAS%20EQUIPMENT%20FOR%202004 .pdf


Gas Furnace Recall (http://www.westchestergov.com/emergencyinfo/LeftSideLinks/gasfurnacerecall.htm)


http://www.emcobc.ca/Menus/Document%20Library/BC%20pdfs/Coleman_DGAT_Notice.pdf

This is a very dangerous situation. TURN off gas and electric to this unit. DO NOT attempt to repair yourself.