Question about Heating & Cooling
My hvac is not cooling. It is DATs/Zone controlled with a honeywell hz322. When I bypass the hz322 by shorting R W on the furnace control board heat runs fine. The HZ322 is reporting DATs temp limit exceeded even when the system has been sitting for days.... Any ideas on how to fix that?
Limit will open when exceeded heat at heat exchanger. possible cause restriction on air flow(blower speed too slow, dirty filter or weak limit switch itself). when unit cooling down limit will reset and start back like nothing was wrong
Posted on Nov 23, 2014
a 6ya expert can help you resolve that 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.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
SOURCE: My furnace works intermittently.
You may have a dirty flame sensor. There are a number of other possible causes as well. Rheem/Ruud/Weatherking furnaces also have problems with the connection on the blower deck.
The flame sensor sometimes must be bypassed around the MOLEX CONNECTOR in the deck due to humidity.
Hope this helps.
Posted on Jan 15, 2009
Is there a setting on your thermostat that makes the unit stay on for 10, 15, 20, 25 minutes after you reach set temp. You can change this setting by looking at your manual for the thermostat. Not sure if there is one for this thermostat but mine has one. Mine was running 15 min after set temp and making it cool down 2 degrees lower than set temp. Hope this helps.
Posted on Jun 25, 2009
This does not sound like a thermostat problem. I would be looking for a zone valve or circulator pump problem.
Posted on Nov 12, 2009
Tips for a great answer:
Sep 29, 2015 | Cars & Trucks
Aug 01, 2015 | Honeywell Heating & Cooling
Jan 21, 2014 | Honeywell Programmable Thermostat Heater
Sep 04, 2013 | Heating & Cooling
Jul 08, 2012 | Honeywell Programmable Thermostat Heater
Feb 09, 2011 | Amana PTH123B25AJ Heat Pump Air...
Feb 14, 2010 | Honeywell Heating & Cooling
Oct 08, 2009 | Honeywell Electronic Programmable...
111 people viewed this question
Usually answered in minutes!