Question about Teledyne Laars Laars Lite2 Heater 175000 BTU NG Elec Ign
If the pilot is on, then it is getting gas. Like the control unit is not kicking on.
Sequencer or heating relay acts like a 24 volt x 120 volt contactor to make the 24 volt thermostat current to allow 120 line voltage to the inducer, for the very first function of the furnace. Without that inducer running, the 24 volt safety circuit cannot function to allow current to get to a control board or module.
Other components include: ignitor, flame sensor, bad pressure switch, dirty burners, bad gas valve, or bad filter can also cause this.
If you have a combination NO, NC 3-wire pressure switch that requires the pressure switch to close current when the inducer is NOT running yet (to thwart people who put jumper wires on one), that pressure switch may be sticky or bad contact inside it, and not closing down(or making good contact) after the furnace shuts off sometimes!! You could jumper the NC terminal and see if at least the inducer runs. Or even **** or blow on the pressure switch tube, into the pressure switch, to see if the pressure switch is sticky. You'd know if by doing so, the inducer were to start up. And by doing repeat tests with and without it, to rule out coincidence, then you'd know if the pressure switch was faulty or not.
Posted on Aug 06, 2010
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
Tips for a great answer:
Apr 06, 2012 | Rheem 50 Gallon FVR NATGAS Water Heater...
Nov 27, 2011 | Procom Heating & Cooling
Dec 19, 2010 | Williams 2509612 Ceramic Mid-Size Heater
Oct 05, 2009 | RTO Atwood Water Heater - 6 Gal LP
May 02, 2009 | Pentair Minimax CH Heater
Dec 14, 2008 | Water Heaters
Aug 17, 2018 | Pool & Spa
48 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: