Question about Ducane 436 inch 2 - 2 burner Grill

3 Answers

Ducane high efficiency propane furnace, pressure switch problem

My ducane furnace wont satisfy the thermostat. when I turn up the heat the burner runs for about a minute, blows out, all the while the fan motor continues to run. when i pull the switch board cover, it blinks 3 times. says that the pressure switch is the problem. I have put 4 pressure switches on this furnace in 3 years. is this just a cheaply made part? or is there other problems causing the 3 blinks(faulty pressure switch)?

Posted by on

  • 1 more comment 
  • chwilson558 Jan 28, 2009

    I am somewhat familiar with my furnace, but where is the evaporator?

    I have found dirt in the past in the 2" rubber coupling that connects to the PVC line. cleaning this out worked for a short time. this is a vacation home.we leave the heat on 45 all winter, but when i turn up the stat, it comes right on. then the issue i listed before happens.

  • chwilson558 Jan 28, 2009

    Ah, the evaporator is the A coil!

    we had filter cloth at one point in the registers for dust , i removed them and the furnace seemed to work fine for about 2 months. I figured the cloth was creating to much static pressure in the duct system. All the sudden the 3 blink problem started to occur again.

    With this cold weather, if the condensate line gets some ice in it, could it make the pressure switch seem as if its the problem?

    could this be creating the effect of a dirty evaporater? ice closing up the condensate line?

    If in fact its a dirty evaporater, do i need to take the furnace off the A Coil(down flow unit) and clean it?

  • chwilson558 Jan 28, 2009

    I agree with everything you are saying except, i have a good bit of water coming out of the condensate line(not like when the A/C is running) but a good bit of water comes through my condensate line in the winter. Remember, this is a high efficientcy has a sealed trap. a 5/8" line comes off the induser and 2 small lines coming off the pressure switch that drop into the sealed trap. when i walk outside, there is a steady drip running out of the condensate line.again, not like in the summer, but water is steadily coming out.


3 Answers

  • Level 1:

    An expert who has achieved level 1.


    An expert whose answer got voted for 2 times.

  • Contributor
  • 1 Answer

A short cycle heat cycle indicat a pressure switch replacement was needed. This did not fix the problem. the problem was in PCV line since the end was filled with slugs and cause the line to backup with water. When this happen the system would stop asking for gas. the water would leak out and it would restart. The problem was fixed by cleaning value at end of PCV. This released the water, two quart of water, that was back up causing problem. Curious if a filter change indicator was providing a clue that was missed?

Posted on Feb 24, 2009

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

The high limit switch on the exhaust fan is bad. Ducane has a replacement part but your contractor has to call them to get it. I am a contractor and found the problem first as ducane techs told me.

Posted on Feb 26, 2011

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 1,214 Answers

Check that there is not a small piece of trash getting into the tube for the pressure switch.

Also check that the evaporator us not plugged full of dirt and dust from an improperly installed or poorly maintenanced filter.
This will cause burner short cycling and inability to warm the space.

Reply what you find and I'll give further instruction.

Posted on Jan 28, 2009

  • 1 more comment 
  • Mark Egan Jan 28, 2009

    Look for where the 2 copper pipes come into the side of the unit. That is the evaporator. The plastic line that I think you are speaking of is the condensate line, where water drains during A/C operation. That's the bottom of the evap.

    Hard to get to, no matter where it is. But, it's a mighty good filter when the filter isn't properly installed or leaks.

    You have described the classic symptoms of a dirty evaporator, or collapsed, closed off ductwork. Maybe a fan running too slow, but rarely that.

  • Mark Egan Jan 28, 2009

    There won't be much if any water in the condensate line in the winter. The cold dry air absorbs most of it, ( and when you heat the air, it absorbs it even faster).

    So no, water won't be freezing in the condensate line right now, and the condensate line is so far away from the pressure switch I think your talking about, it shouldn't have any impact anyway. The pressure switch only proves to the control board the inducer fan is running before it turns the gas valve on.

    So yes, "A" coil it is (another term for evaporator).. And downflows are usually easier to clean. You should be able to get get the front panel off the A coil case, and reach inside to pull out what is now a blanket of dried dirt/duct/lint/hair. If the coil is a slab, there will only be one surface to clean. If it's an A coil, there will be two.

    You'll be surprised next summer how much better your A/C is going to work, especially if no one has jacked around with the refirgerant charge.

    I wouldn't worry too much about cleaning the coil, though. It will clean itself next summer when the A/C is used. At least don't worry about it if you can pull the blanket of stuff off, and don't see embedded dirt clogging the coil. Be sure and have all you noce white things away from the supply air grills when you start the uniti back up, becuase there is going to be some dust blowing when you first start the fan up. And to minimize cleaning later on, flipt the Fan switch on the thermostat to ON, for a short time (thats the same fan speed as the A?C uses.).

  • Mark Egan Jan 28, 2009

    Oops, my bad. You've got one of those really efficient 90+ furnaces.

    Still, same result though. It's not ever cold enough in there to freezer water to plug anything up unless you loose power for 2-3 days at below freezing temperatures.


1 Suggested Answer

  • 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 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

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Ducane furnace

Pressure switch is bocked inside try a small drill bit to clean down the connection tubes and blow it out after , check hoses are not blocked or split ,

Feb 12, 2012 | Ducane Grilling

1 Answer

I cannot find a supplier who can provide an LP to nat gas conversion kit for my 4 burner grill made under the name: Ducane, model # 30400040. Can you assist? Marlin

Perhaps, the reason you can't find the fuel conversion parts is that they are not convertible from one fuel type to another. Ducane/Weber makes both an LP model and a Natural Gas model of your grill, but no conversion kits. Because, as the Owners Manual states "Liquid propane gas is not natural gas. The conversion or attempted use of natural gas in a liquid propane unit or liquid propane
gas in a natural gas unit is dangerous and will void your warranty."

Certainly, you could attempt it, Marlin . But it's not the wise thing to do.

I know this wasn't the answer you may have wanted, but I hope it helps you.

May 06, 2011 | Ducane 30400040 Stainless Steel Grill

1 Answer

Burner Replacement , How to disassemble.

Unfortunately, Ducane is the only grill manufacturer who requires the removal of the front control panel, to replace the burner(s).

Here is a link to the Meridian Series grills. Click on the link that is your model and you can download and print the owners Manual. In it under Maintenance, it will describe and show you how to remove and replace the burner(s).

Hope this gets you back up and grilling.

Apr 29, 2011 | Ducane Meridian 30557501 Propane Grill

1 Answer

Where do I get replacement parts for my meridian 5 burner grill model #30557501?

Depending on the parts you need, you can find them at the following link.

Hope they have what you need and Happy Grilling!!

Apr 21, 2011 | Ducane Meridian 30557501 Propane Grill

1 Answer

An operating manual for the ducane meridian propane grill is need

this model is no longer in production and ducane do not provide on they site any manuals for it, as ducane is brand owned by weber, i would suggest asking at weber directly.

i assume you are in usa?

Jul 22, 2010 | Ducane Meridian 32 Inch 5 Burner Gas Grill...

1 Answer

I have a ducane grill and it will not get hot. I

The most common cause of reduced flames is a pressure problem. Could be the gas regulator for the grill. When the burners are on try giving the gas regulator a tap with something hard and see if they change size. If they do then the rqulator could be sticking. And there is a very small hole on the regulator called a vent. If this hole gets plugged with dirt or grease you can get a low pressure problem. Look very carefully on the regulator housing for this small hole and verify that it is clear. Try using a small metal wire(like a tie strap for sandwich bags) to make sure it is clear. Also verify that the tank(if propane) is not overfilled. An overfilled propane tank will cause a pressure problem. You can turn the relief screw on the propane tank until no more liquid comes out to see if this fixes your problem.

Jan 14, 2010 | Ducane 30400040 Stainless Steel Grill

1 Answer

My Ducane grill is not burning at full capacity.

check the orifices they can get clog!

Dec 06, 2009 | Ducane Grilling

1 Answer

I'am trying to convert a ducane grill from propane to natural gas and I need to know the correct dia to drill the orifices. Any ideas??

when you convert a Ducane nat. gas grill to propane do you need to adjust the opening in the burner tubes

Nov 06, 2009 | Grilling

Not finding what you are looking for?
Ducane 436 inch 2 - 2 burner Grill Logo

2,340 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ducane Grilling Experts


Level 3 Expert

2029 Answers


Level 3 Expert

63242 Answers

Dan Webster
Dan Webster

Level 3 Expert

8205 Answers

Are you a Ducane Grilling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides