DIY Chatroom Home Improvement Forum

DIY Chatroom Home Improvement Forum (http://www.diychatroom.com/)
-   HVAC (http://www.diychatroom.com/f17/)
-   -   Lennox Residential Controller (http://www.diychatroom.com/f17/lennox-residential-controller-89426/)

ninetyzero 12-12-2010 03:36 PM

Lennox Residential Controller
 


I was at a friends house yesterday morning looking at their HVAC issues.
They have a zoned system that has a LZP-2 control board.

I found that the zone 2 terminal is not getting voltage at the G terminal. But for some reason, it will turn on sometimes. Run for maybe 2 minutes, and then cut back out. It will also short cycle. Come on for not even a second, cut off. 10 seconds later do the same thing.

I found a loose red wire on the upstairs thermostat, but that did not fix it.

Zone 1 works perfectly fine. The fan will be commanded on as it should, and stay running like it should.

I took all the wires off of the Zone 1 terminal, and swapped zone 1 and 2. Zone 2 (now the downstairs) started to short cycle like the second floor did, and the upstairs worked fine.

So my question is, does this mean the LZP-2 controller is bad? The fan controller seems to be getting the voltage from the LZP-2, but Zone 2 seems like it has no voltage at all. Any thoughts? Let me know if you need more info, thats all I can think of right now.


All times are GMT -5. The time now is 07:38 AM.


Copyright 2003-2014 Escalate Media LP. All Rights Reserved