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How to check if holly 25s-d wall heater is venting correctly

I need to make sure it is venting correctly

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Posted on Jan 02, 2017

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SOURCE: empire wall heater with wall vent pilot light

It sounds like the gas valve is dropping out. Make sure the system is venting the exhaust(no restrictions). Then make sure all your wiring connections in the unit are tight. In a millivolt system if all wiring connections aren't tight and clean your circuit will drop in millivolts and the gas valve will drop out. The gas valve requires a certain millivolt to stay open. I hope I was of some assistance!! Good luck!!

Posted on Nov 29, 2009

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SOURCE: Need instructions on lighting a holly

Where to buy replacement gasket for old gas wall heater: Narrowall Model Number - 350S-D Serial number - 3010 Holly Manufacturing Co.

Posted on Feb 01, 2011

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Water temp flucuates from hot to cold, esspedially on very rainy days.


Gas water heater problem based on weather could imply atmospheric interference, which might indicate venting problem. Check vent specs for that model. Make sure roof or side wall vent are installed correctly, and lenghts do not exceed maximum.
Problem might also be associated with elevation setting, since water heaters are sold to match expected conditions at that elevation.
If rain is associated with cooler temperatures, and more gas appliances run at same time, then unit might be starved for gas or home does not have enough ventilation.
Problem could also indicate that tankless unit needs to catch up on yearly maintenance, including clean burner and combustion parts, check loose wiring, test ignition system, clean air intake, bleed gas line, check gas pressure and check for correct vent, etc.
Before calling service technician, open following link for Bosch troubleshooting resources including Bosch contact, typical manuals, etc.
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html

Aug 09, 2011 | Bosch GWH 425 EF L Water Heater

1 Answer

Our Rheem gas water heater was acting finicky a few months ago so we called the manufacturer and they sent us a new/replacement kit for the Invensys WIPER Electronic Control & FV Sensor. We replaced...


You're probably in for a service call and/or possibly water heater replacement if unit is more that 5-6 years old.
Your water heater plugs into outlet. Check outlet with cheap circuit analyzer to make sure the unit is receiving correct polarity without line interference.
If unit is in the attic, then add more venting to soffit and roof so pilot is not being snuffed out by hot air. If unit is in basement, then open some doors and a window and see if unit needs more air.
Most gas water heaters require yearly cleaning and service.
Clean the combustion parts and tubes.
Clean the air intake.
Have gas company check gas pressure.
Open following link for possible illustrations:
http://waterheatertimer.org/How-to-install-gas-water-heater.html#troubleshoot

The problem can be bad gas control valve, air in gas line, low gas pressure, gas shut off handle not fully parallel with gas line, dirty combustion parts, lack of combustion air, improper venting. Or combination of all things. It's an electronic gizmo, anything can be bad or shorted, and repair may not last long.

Without a trained service technician to ohm-test the parts using correct service manual, then we are guessing at the cause.

Power vent water heater implies that you have side wall venting which must be replaced with another side-wall vented unit -or- it implies rapid reheating of water.

If water heater is more than 6 years old, you might be money ahead by installing a new one from local box store. Avoid the power vent and electronics. Local box store will have passive roof-venting type water heater BUT box store does not sell side-wall power vent. If your power vent goes up through the roof, then box-store variety gas water heater will work. Total cost $350 do-it-yourself for 40 gallon gas.
Or get 40 gallon 240Volt electric for $220 and connect to circuit breaker box. Requires no venting, and is easy to repair for years to come.
Or small 120Volt electric that plugs into outlet to tide you over until gas repairs can be made.
Look for scratch-n-dent models and always offer 10% off.
http://waterheatertimer.org/How-to-install-gas-water-heater.html
Shower uses 5-9 gallons hot water.

Aug 01, 2011 | Rheem Water Heaters

2 Answers

Hello i have a williams wall Furnace model#25-35-50. I need to know if its a base board heat and also if you could tell me which wires are which. 1 red and 1 white


What you have is a Direct Vent, Gas WALL Heater. It is normally mounted about 6" off the floor on an exterior wall (since it has to be direct vented out). Not sure what the red and white wires are for, but suspect it's for the optional thermostatically controlled blower connection.

In any event, to help you install this heater properly, I have included a link to the Owner/Installation Manual, which should provide all the information you need to complete the installation correctly.

http://shopfnc.com/pdffiles/williams2man.pdf


You can download and print the manual for future reference.

Feb 26, 2011 | Williams 3003622 Ceramic Wall Mounted...

1 Answer

I have a Sterling garage furnace,pilot is on ,but main burner will not light.


Be sure you turned the Control knob from Pilot to ON. Without doing that the heater will not turn. If that's not the problem, the Thermopile may need replacing. Also, check the volume of gas at the heater. It should be a minimum of 5 to 7 water column inches. If it has a wall thermostat, be sure the wires are correctly installed at the heater and the wall thermostat and the it's turned up higher than the ambient air temperature in the garage. If this is an older installation, be sure the exhaust vent piping is not blocked.

Feb 09, 2011 | Sterling RF75 Natural Gas Heater (75,000...

1 Answer

Need instructions on lighting a holly manufacturing company wall gas heater. I can't figure out what position is on for the main and pilot valves. Tried every position, but it won't light.


Where to buy replacement gasket for old gas wall heater: Narrowall Model Number - 350S-D Serial number - 3010 Holly Manufacturing Co.

Nov 25, 2010 | Heating & Cooling

1 Answer

The heater pilot goes out when the wind blows outside of the wall where the heater is installed. The heater is only six months old, so the thermo-couple is OK.


You mention that the thermocouple is OK, has it been changed or tested? This $4 part is usually the first thing to fail and I have found bad parts right out of the package. If I were you and I would contact the installing contractor to have them check out the following: Is the vent termination located as per manufacturing instructions (away from interior adjoining walls), Are the vent parts installed correctly, replace the thermocouple under the warranty, and check to make sure the pilot is both good and strong and it is hitting the thermocouple where it should. I have these heater installed on the top of Mount Washington where the wind blows at over 60 miles an hour and do not experience a pilot outage due to wind. The interior design of the venting system combats the wind effects. Good luck to you.

May 06, 2010 | Cozy (W352E) Heater

1 Answer

Empire wall heater with wall vent pilot light


It sounds like the gas valve is dropping out. Make sure the system is venting the exhaust(no restrictions). Then make sure all your wiring connections in the unit are tight. In a millivolt system if all wiring connections aren't tight and clean your circuit will drop in millivolts and the gas valve will drop out. The gas valve requires a certain millivolt to stay open. I hope I was of some assistance!! Good luck!!

Nov 29, 2009 | Empire Direct Vent Wall Furnace Millivolt...

1 Answer

Procom fireplaces


Empire makes a wall heater that is direct-vent that looks similar to vent- free wall heaters. Here is a link to a website that sells their products... http://www.mastersalesonline.com/empire/index.html. I am not sure of the prices you will need to call the on-line store. I hope this helps you.

Jul 08, 2008 | Procom ML300TBA Heater

3 Answers

Heater won't come on when temp drops...must reset limit switch every time.


The limit switch is shutting off and you are having to press the re-set button, right? The limit switch, if I am understanding you correctly, is the thermal disc type, may be ok, but what is causing it to shut off? I would first, not put total faith in the serviceman (PG&E maybe) and replace the limit switch. Its only a few bucks,and easy to do. Then if its still the same problem, look into the venting pipe. As it may not be adequate for the heater. Espically if its new. These new wall furnaces are kind of touchy. It may be larger, BTU wise, and the vent pipe may need to be enlarged. If this is a big job, and a bit too impractical, check the vent pipe, make sure its in good conditon, no leaks ect. install a cO2 detector and by-pass the limit switch.

Jan 07, 2008 | Cozy (W352E) Heater

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