Question about Heating & Cooling

Open Question

Honeywell st9420c programmer, when the water and heating are switched on, should a flame show on both sides, or just one? I have a vailant ecotec plus 624 system boiler and unvented cylinder, and have just had this programmer fitted. Not sure if it is wired correctly. Any help would be appreciated

Posted by on

  • wendy holmes Feb 07, 2012

    As an unvented cylinder is classed as "another radiator", not sure whether the flame should show under the hot water on. The lights are on, and the tap is shown, as well as the radiator sign, but only the flame shows above the radiator sign on the heating side of the programmer.

×

Ad

3 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
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.
New users get to try the service completely Free afterwhich it costs $6 per call 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.
Goodluck!

Posted on Jan 02, 2017

Ad
  • 70 Answers

SOURCE: Installing CM900 Honeywell into Junior 24 Bosch Combi

What kind of boiler are using is this boiler a on the demand electric or gas? You need low voltage wires. If you get me make and model # of off boiler i can try and find wiring diagram . Tell me a little more about you heat system to. Like baseboard heat or in floor how many zones

Posted on Jan 16, 2009

Ad
  • 2557 Answers

SOURCE: f22 error/ low pressure

F.22 Dry fire Too little water in the appliance, water pressure sensor defective,
cable to pump or water sensor defective, pump blocked or defective,
pump output too low

Posted on May 12, 2010

Testimonial: "thank you so much the information supplied allowed a local plumber to fix our problem in minutes 10/10"

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My Honeywell dt200 is displaying a flame when I turn it on but isn't actually heating.


The problem could be with the heating unit or furnace and not the thermostat.

Aug 10, 2015 | Honeywell Programmable Thermostat Heater

1 Answer

Vailant ecotec plus 837 - Water pressure and temp is too high


Pressure inside the tank will rise along with the water temperature. As the water inside cools the pressure will wane until the heating element turns on and reheats the water with a subsequent rise in pressure. Running the hot water at the same time will draw heat energy from the boiler and lower the internal temp and pressure as well.

Jan 21, 2014 | Water Heaters

2 Answers

Flame symbol showing on theremostat


It's not your thermostat. Go to where your heating system is and give us a make and model number so we may help you.

Feb 11, 2010 | Honeywell Programmable Thermostat Heater

1 Answer

Hot Water But No Heat In The Radiators


bleed radiators and check for dirty flame sensor and clean it with steel wool

Oct 28, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

Cannot get central heating working,for honeywell ST6400 programme


with y plan 3 connections on programmer HW on HW off CH on HW on to cylinder stat then HW call to Orange on Mvalve to power boiler and pump HW off to grey wire on Mvalve to close hot water CH to room stat common then heating call to white on Mvalve

Jun 13, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

Honeywell ST6400C programmer


Hi yes sound like it not working on hot water only it would check ou the wiring on this side

Jul 25, 2008 | Honeywell Programmable Thermostat Heater

Not finding what you are looking for?
Heating & Cooling Logo

Related Topics:

39 people viewed this question

Ask a Question

Usually answered in minutes!

Top Heating & Cooling Experts

Paul Carew

Level 3 Expert

2557 Answers

Dan Webster
Dan Webster

Level 3 Expert

8220 Answers

Donni Steen

Level 3 Expert

659 Answers

Are you a Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...