Gas Furnace Re: Can't Keep-Up When It's Cold / Low Heat A gas furnace operating correctly typically has no problem maintaining the space temperature even when it is cold outside. Qty Possible Causes (From Most to Least Likely): Dirty Air Filter Clogged Indoor Coil ...

Ameristar Package Unit Re: Lockout Codes Code Description On Power to control Slow Flash Normal, Call for heat 2 Failed to detect or sustain flame (1Hr Retry) 3 Pressure Switch or Inducer Motor Problem 4 High Limit or Auxiliary Limit Open 5...