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I have a honeywell PA404A pressure control switch on my home gas steam heating system. I'm having a problem with the switch turning off the system. It will only come back on if I turn the top screw all the way out, then back down to approx 5psi. At this point the heat will turn on but when the thermostat shuts down the system it will not turn back on when calling for heat unless I adjust the screw again. Also, the switch will only turn on the system when set at 5 on the dial on the inside. Any ideas? Thanks, Crai

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This may be caused by accumulation of sludge in the steam trap (the looped tube that connects the pressuretrol unit to the boiler). the sludge restricts the pressure from reaching the diaphragm in the pressuretrol unit. So it gets a false reading. Clean or replace the tube and see if normal function resumes.

Posted on Dec 07, 2009

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Here's a link that may help it explains the controller and how it works. http://customer.honeywell.com/techlit/pdf/PackedLit/60-2341.pdf I personnally would not be adjusting this control as you have been because its a safety that shut off the unit in a unsafe condition. If it's malfunctioning then thaat is when you need to call a service company to check out why. You would not want your unitto explode because of a high pressure condition. Please have your unit serviced.

Posted on Jan 06, 2009

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My unit is a Honeywell and not a Muirfield.97-4118/5-89 and it will not work on auto but works on manual.


If it's a new thermostat that you have recently installed, check your installer configuration. Make sure the tstat is set up for gas or electric heat, depending on what you have. Some t-stats also have a small switch on the back to switch from gas to elec. A gas furnace has components to control the fan, electric unit uses the tstat to control the fan. Hope this helps!

Mar 21, 2017 | Honeywell Heating & Cooling

Tip

Hot Water Steam Efficiency Plus Comfort


Steam heat is a great warm, wonderful, and absolutely fabulous way to heat your house. Steam heat is almost always created from water in a boiler fueled by gas, oil or electricity. It then passes through pipes and radiators or convectors to heat your home. A steam heating system uses steam that is generated from a boiler. When the water boils, the steam rises through the pipes and into the radiators to heat them. The hot radiators then heat your home.

Steam is a great heat distribution medium because it moves easily through your system and it has an extremely high heat-holding capacity. The heat-holding capacity of steam is much greater than that of water. Steam heating systems often operate at very low pressures and usually under 220°F. Steam heat is usually distributed by either one or two pipe systems. In a case of a one-pipe steam heating system, a single main serves the dual purpose of supplying steam to the heat exchanger and allowing condensate to run back from the radiators also. A two-pipe system has two connections from each heat exchanger or radiator. In this system, steam and condensate flow in separate piping from each other. With a steam system all pipes must be well insulated and you must use pipe insulation rated for steam piping. If the insulation is removed the system will no longer work as designed. Noise and all sorts of problems will come from uninsulated piping.

When you have radiators on upper floors or radiators that are further from the boiler they should be adjusted to release more air to compensate for the increased air volume in the piping due to the distance from the boiler. If you have a valve that is clogged with mineral deposits or stuck shut, no air will be able to get out of the piping. Because of this no steam can enter the radiator, so it doesn't heat up. This will block the movement of steam into the radiator, or cause a very noisy hammering as pressurized steam tries to get through this water "dam".

Steam radiators need to have a valve that allows air to escape at a controlled rate so that the radiator can heat up. Steam heating systems will also lose a little bit of water all the time, so there has to be water makeup so that you do not run your boiler dry. Steam heating systems without an automatic water feeder are not safe. You will risk serious boiler damage should boiler water be lost. If the boiler runs dry it could also explode if water is placed into it while it is hot. There should always be a low water cutoff installed on every steam system. Therefore on a steam boiler the automatic water feeder serves as a safety device also.

It is very important that you find someone that is very familiar with steam heating systems when repairing or installing steam heating. Incorrectly designed, installed, steam systems and condensate piping is a huge problem in today's buildings and facilities. There are not many qualified to design and install properly operating steam heating systems. Incorrect steam piping will always cause costly premature failure of steam equipment such as steam coils, heat exchangers, and control valves. Not to mention the higher cost of operating a system that is not working efficiently.
http://www.fixya.com/support/r3904286-steam_system_steam_radiator_air

http://www.fixya.com/support/r4008078-differences_between_steam_hot_water

on Dec 29, 2009 | Heating & Cooling

1 Answer

When i turn the heat up sometimes it takes a long time for the gas furnace to start ..why?


Watch your furnace when you turn the thermostat up...make sure to record everything that it is doing. If you have an induced draft, forced air system, then the heat sequence of order should go like this... Initial call for heat from tstat, Inducer vent motor turns on-pulls in the pressure switch, circuit board sends power to igniter whether it is spark or hot surface, then gas valve opens. Flame sensor senses flame, burner stays on, and blower motor kicks in to heat the space. If you notice any variance from this, then something needs to be checked by an HVAC Service Tech.

Dec 14, 2013 | Honeywell Programmable Thermostat Heater

1 Answer

My Honeywell Water Heater Thermostat will turn on for 30 seconds. Then it shuts down- wait 5 seconds turn it off EITHER with the ON/OFF switch OR by turning thermostat to off & back on immediately! If...


Time to call qualified service technician. And watch what that person does to learn about your water heater.
I assume you have Honeywell Icon gas valve. Honeywell makes different several model numbers.

Here is 'typical' Honeywell Icon gas valve service manual for Bradford White, that may or may not apply to your water heater. It shows testing for Icon and disassembly instructions, and error codes.
http://waterheatertimer.org/pdf/Bradford-white-service-manual-44943-D.pdf

Gas water heaters today require yearly service that includes cleaning burner parts and combustion chamber, checking vent and air intake, electrical connections, testing gas valve, checking gas pressure, bleeding air out of gas line, etc. These are things you can learn to do by reading service manual, and making sure you have a spare water heater around to connect real quick if experiment goes wrong.
If Icon gas valve is problem, that control is modular and can be replaced without draining tank.
http://waterheatertimer.org/How-to-install-gas-water-heater.html#troubleshoot

Aug 07, 2011 | Honeywell Water Heaters

2 Answers

The emergency heat will not turn on in my system. I also noticed the emergency heat light does not turn illuminate on the Honeywell HZ322 TrueZone Panel even if the emergency heat button is pressed. The...


Yes, I believe you are correct concerning the circuit panel.

Regarding your heat pump not keeping up ...depending on what part of the country you live in, heat pumps are not the best thing to heat with. As you probably already know, once it reaches 32 degrees outside, the heat pump stops working and the electric furnace or heat strips come on to supply warm air. Frankly, when that happens, it's like turning on your kitchen toaster and blowing air across it with an electric fan. Doesn't sound to efficient does it. Plus, your electric meter is spinning like crazy and the power company is falling in love with you.

In my area (Virginia) most new home construction is now using what's called a dual fuel system. It's a heat pump, but it has a gas furnace backup for when it reaches 35 degrees outdoors. It's very, very efficient and a very comfortable heat. The gas furnace can run on either Natural Gas or Propane Gas.
In most cases this can be added to an existing heat pump system. The only thing necessary is the Gas Furnace, since you already have a heat pump and all the duct work. Could probably be added for a whole lot less than you''d expect.

The other option is to add a vent-free gas fireplace or vent-free gas logs, if you have an existing solid fuel burning fireplace. They are great for zone heating and/or supplemental heating. Plus, if you have a power outage in the middle of the winter, they'll still work, as they don't require any electricity.

I didn't mean to run own, but I hope all this helps you solve your heating problem.
Please let me know.

Rich

Feb 09, 2011 | Amana PTH123B25AJ Heat Pump Air...

1 Answer

All electric new home. Bought honeywell programable thermostat RTH2308. A/C works but heat will not turn on. This model # is not on their web site.


check to make sure there is a jumper wire on the subase between "rc" and "rh". these designations stand for red/cooling and red/heating.they are used independently if the system has a separate control transformer for heating and a separate one for cooling. they need to be jumpered when one transformer is used to control both modes. your fan "on" switch won't work the fan continuosly if there is no connection to the "r/c" trminal.
on the back of the thermostat there should be a switch you need to select for gas or electric heat. or there are small micro switches that need to be set for your particular application.check your installation papers for details.
these thermostats usually cover a wide range of applications and need to be selected.

Dec 29, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

I am attempting to turn on the home central gas heater for the first time this year. It is controlled by a honeywell self ignition model number sv9541. I follow the instructions on the front panel and...


Check to make sure the gas valve is opened. I've turned mine off for the summer months; when I went to use the heater for the first time...I realized I had turned the gas off.

Nov 17, 2009 | Honeywell Programmable Thermostat Heater

3 Answers

Replaced mercury thermostat w/Honeywell CT87K - doesn't work!


You need a specific thermostat for a Wall Furnace it is a Millivolt Thermostat and not a 24v standard thermostat....usually it will work anyway however if the powerpile (generator produces millivolts from the pilot light) is weak it may not be producing enough...or the Pilot light may be dirty and lazy...won't produce enough millivolts ...or you can have bad or dirty contacts or connections....or a combination of any of the above.....a 24v Thermostat and particularly a non-mercury thermostat has too much resistance in it for a millivolt system....as your Wall Furnace (other than the fan) runs on less than 1 volt

Oct 31, 2009 | Honeywell CT87B ROUND HEATING&COOLING...

1 Answer

Furnace will not heat.


Most of the Lennox G-16s that I have repaired were having problems with the gray Penn-Johnson Piggyback igniton control module.
This is best repaired by replacing the spark module. Sometimes it may be neccesary to replace the gas valve also. Lennox updated to a ROBERTSHAW ignition system. Honeywell can also be used.
Also check that there is no water in the pressure switch or tube.
Hope this helps.
Matt
machtcl1@verizon.net

Jan 13, 2009 | Honeywell Electronic Programmable...

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