Question about Dayton G73 Utility Heater

Open Question

Dayton Model 4E459A Gas Unit Heater....200,000BTU

I just installed a used unit heater in my shop today. I had to convert it from NG to LP. I was tickled to see it worked fine, then finished the instalation with routing a new vent stack. Since installing the "stack", the heater intermittantly pops and cracks, reignition "flashes", etc.....Do you think the stack has restricted the air flow enough to be cutting out the vacuum switch? The hi-limit? What should I do? Any suggestions where to start? THANX!

Posted by on

  • jdn58 Apr 10, 2008




6 Suggested Answers

  • 2 Answers

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

a 6ya Repairman 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 repair professionals here in the US.
click here to Talk to a Repairman (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

  • 625 Answers

SOURCE: dayton mod#3e219b gas heater

air compressor output should be 3.5 psi. to the fuel nozzle. the cowlings purpose is to channel the air-fan output through the rear vanes of the combustion chamber. if these openings are restricted then air can't get into the chamber. check to see that the fan blades aren't jammed against the cowling. if they won't spin then you won't get any air through the unit.

Posted on Dec 26, 2007

  • 232 Answers

SOURCE: dayton unit heater

Dayton heaters are a product sold by Grainger. Contact them for a manual.

Posted on Aug 27, 2008

  • 407 Answers

SOURCE: my Dayton Gas Unit heater will not stay on. The

Have you tried the flue vent? If not, an easy way to check this would be to take the vent pipe off of the unit and see if it continues to have the problem. In most cases, this happens when you have blocked return air or dirty filters, flue blocked, or induction is blocked from switch or housing. One other possibility would be a dirty/clogged a coil which isn't allowing sufficient air to push out causing the limit to trip. I hope this helps somewhat.

Posted on Feb 07, 2010

  • 111 Answers

SOURCE: I am looking for a ng to lp conversion for a


Posted on Dec 24, 2010

SOURCE: model #3e243b Dayton heater chg from LP to NG

Dayton is primarily sold by . You must purchase a re-jetting kit (Natural Gas Valve) from them to accomplish this.

Grainger Part # natural-gas-valve-1fek5_as01.jpg view_larger_button.gif Natural Gas Valve
Item # 1FEK5
Natural Gas Valve, For Use With 5VD61, 5VD63, 5VD65 DAYTON
1FEK5 4401 Usually ships
1-3 Days 1 $144.30 item_sale_symbol.gifSale Price$115.44 See All: Parts

Posted on Sep 23, 2011

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

I have a GWH1600h LP. can this unit be converted to natural gas with orfice change? If so, where to obtain the part. Thx much. Al

The 1600 series Bosch tankless water heaters, including the GWH1600H LP water heater, do not support a LP to NG gas conversion. Bosch does sell a gas conversion kit, 8719002176 , for the 2400/2600 and a few other water heater models. See for the applicable models.

I wish that I had better news for you. See for some of the details. (The professional model water heaters are more likely to support gas conversion. However, it depends on the specific water heater burner/exhaust designs.)

Cindy Wells

Mar 05, 2017 | Kitchen Ranges

1 Answer

How to Convert to NG

You have to contact the manufacturers rep in the community to verify that the particular model of Dayton heater has the capability of NG to LP conversion. If it is, the natural gas kit will include a new set of brass 'spuds'...typically referred to as 'orifices'....for the main burners. The size of the hole will be considerably larger because NG contains less btu per cubic foot than LP gas.

There will be a replacement pilot orifice for the pilot assembly. Removed and installed usually a 1/2" and 7/16" wrench. This orifice will also have a larger diameter opening.

There should be a regulator to match the 100% redundant gas valve that is in your heater. Note though, that there may be several regulators in the kit to match any one of several brand gas valves that could've been installed on your heater....Robt Shaw, White Rodgers, Honeywell. They will NOT interchange with one another. Follow the directions closely to ensure installation is done are working with a volitile, explosive gas !!!!

There may or may not be a set of air shutters to fit over the ends of the burners for primary air adjustment. Natural gas may require a bit of air adjustment to get the proper flame.

Thoroughly leak test everything when done, then leak test again.
If you feel you are in over your head, you probably are so contact a reliable service organization to do it instead. But at least you now have an idea of what is involved.

Aug 21, 2014 | Dayton (4LX45) Gas Heater

1 Answer

Model #3e243b Dayton heater chg from LP to NG

Dayton is primarily sold by . You must purchase a re-jetting kit (Natural Gas Valve) from them to accomplish this.

Grainger Part # natural-gas-valve-1fek5_as01.jpg view_larger_button.gif Natural Gas Valve
Item # 1FEK5
Natural Gas Valve, For Use With 5VD61, 5VD63, 5VD65 DAYTON
1FEK5 4401 Usually ships
1-3 Days 1 $144.30 item_sale_symbol.gifSale Price$115.44 See All: Parts

Sep 23, 2011 | Dayton (3E379) Heater

1 Answer

What parts do I need to convert a Dayton model 3E839 shop heater from NG to Propane?

I would contact grainger industrial suuply at www, heaterparts. They are the main distributor of dayton parts and if you have your model number and serial number they can get you the proper kit to convert.Make sure you specify that you are wanting to go from N.G. to L.P.. Thank you. This is a good company. I have dealt with them for years and they have nice knowledgeable people usually have what you need and ship promptly.Check with them to see if they have a distributer close to you and you can go pick it up yourself. Thanks again.

Apr 17, 2011 | Heating & Cooling

1 Answer

Can this heater be converted from LP to NG ?

you need to change reg spring pilot injector and burner injector and reset pressure to heater , should be able to buy kit on line

Jan 29, 2011 | Dayton (4LX45) Gas Heater

1 Answer

I need to convert this water heater to natural gas. Is there a kit available to do this?

No kits are available to convert his unit to NG. This is because the LP uses copper pipe and is within code, the NG uses black pipe and each unit is specifically designed, entirely, to use the gas associated with the unit.

Feb 05, 2010 | Bosch AquaStar Propane Tankless Water...

1 Answer

Have a dayton hanging garage heater when trys to start acts like gas valve not opening heaters brand new.what should i look for

I have never seen a dayton gas heater but I will try. If this is an LP Gas
System are you using a 30lb. Cylinder, 100 lb cylinder or a whole house

Next are you sure you got the right gas unit for the right gas system?
If using LP gas did you put an external pressure regulator before the unit?

Next is the a hot surface glow coil or a spark system ignition system?
If you have to hold the controller down and press a button similar to a outdoor gas grille is it sparking?

If it is sparking,did you bleed all of the air out? This could take several
tries on a new unit. Does this have a wall mounted thermostat that
controls the heater? Finally check to make sure that the gas valve
is switched on if it has that option.

Good Luck

Jan 14, 2010 | Heating & Cooling

1 Answer

My dayton NG heater fan will not shut off properly

Sounds like a bad fan switch. The switch is located on the heat exchanger and is 110 volt bi-metal switch. Follow the wires from the blower going back to the heatexchanger. Graingers can get you a new switch if you give them your model number.

Dec 12, 2009 | Dayton Heating & Cooling

1 Answer

Can the Dayton model 3e368e be converted to use

If you know a dealer or repair company,they can order orifices to change out in the unit.

Oct 17, 2009 | Dayton (3E386) Heater

Not finding what you are looking for?
Dayton G73 Utility Heater Logo

Related Topics:

106 people viewed this question

Ask a Question

Usually answered in minutes!

Top Dayton Heating & Cooling Experts

Paul Carew

Level 3 Expert

3087 Answers

Mack Baxter

Level 3 Expert

383 Answers

Dan Webster
Dan Webster

Level 3 Expert

8220 Answers

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

Answer questions

Manuals & User Guides