Question about Honeywell Heating & Cooling
I had exactly the same problem. F4 code says the control valve has jammed --- but it hadn’t.
I ended up having to swap out the room controller and the base unit (I bought the pair since it was winter and I couldn’t ‘eff’ about)
On investigating (well, you have to don’t you?) I could find no obvious fault but did notice that a large electrolytic capacitor was across the actuator motor.
Since these things work by reversing the supply polarity to the motor to drive the actuator one way and the other it strikes me as strange that a polarity sensitive component, one that must be always connecter positive to positive, is used in the way that it is.
Bottom line, tough luck, mate. Replace the units.
Posted on Jul 31, 2008
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
Tips for a great answer:
Jan 23, 2014 | Honeywell Programmable Thermostat Heater
May 22, 2011 | Honeywell Heating & Cooling
May 17, 2011 | Honeywell Heating & Cooling
May 01, 2010 | Honeywell Programmable Thermostat Heater
Mar 10, 2010 | Honeywell Heating & Cooling
Oct 17, 2009 | Honeywell Programmable Thermostat Heater
May 10, 2009 | Honeywell Programmable Thermostat Heater
Jan 22, 2009 | Heating & Cooling
Jun 27, 2008 | Heating & Cooling
May 21, 2008 | Honeywell Heating & Cooling
1,387 people viewed this question
Usually answered in minutes!