[HE>I]

Howdy fellers,

So i have a stone age forced air furnace Carrier unit MO# 585CJ030050. And i am not afraid to admit that this unit is kicking my butt. I am a young tech, I am very comfortable troubleshooting, but this set up is very unfimiliar to me being that the unit is 20+ years old. Client does not want to replace the unit, they want to limp it along as long as possible. So...


I am geting a call for heat, i can smell the gas engage, but no spark from the ignitor/pilot, which obvioulsy results in no flame in the burners. I have gone through tracing the 24volt and i bought two parts feeling comfortable with what i think is the solution, but i love to get feed back when im not 100% set. The service call is tomorrow, lets hear what you guys think! Any thoughts from my veterans who recognize this set up?

Main Componants in the heating cycle:

1. Heating Relay
2. Gas valve
3. Electric ignitor ignition
4. ignitor/pilot with pilot tube
5. burners

Outdoor residential package unit, NO INDUCE FAN MOTOR OR PRESSURE SWITCH.

 

[buford]

Power to the ignitor, if not why . do you have pilot gas flow when there is power to the ignition control? Some things to check.

 

[Bazooka Joe]

As you already bought parts for this unit, on some of these dinosaur units that are still in good overall condition, in the future when you come across a similar situation, you may want to consider buying a retrofit universal intermittent pilot spark ignition system, made by either Honeywell or Robertshaw. Packages comes with a natural gas valve ( there are kits to convert to propane ) flame sensor/spark ignitor and the module. They come in different BTU sizes, and comes with bushings to hook to either 3/4" or 1/2" gas pipe. Contractors price is somewhere around $ or less , wire in your operating existing safeties, check gas pressure, Comes with detailed instructions. Less call backs then trying to change parts on a dinosaur existing heating parts.

 

[buttwheat]

3 wire pilot unit?

 

[HE>I]

I did have power to the ignitor, and I disconnected the gas pilot tube but it was raining and windy so I couldn't get a clear scent of gas. Definitely a good starting point for tomorrow!

 

[HE>I]

Power to the ignitor, if not why . do you have pilot gas flow when there is power to the ignition control? Some things to check.

As you already bought parts for this unit, on some of these dinosaur units that are still in good overall condition, in the future when you come across a similar situation, you may want to consider buying a retrofit universal intermittent pilot spark ignition system, made by either Honeywell or Robertshaw. Packages comes with a natural gas valve ( there are kits to convert to propane ) flame sensor/spark ignitor and the module. They come in different BTU sizes, and comes with bushings to hook to either 3/4" or 1/2" gas pipe. Contractors price is somewhere around $ or less , wire in your operating existing safeties, check gas pressure, Comes with detailed instructions. Less call backs then trying to change parts on a dinosaur existing heating parts.

The logic is definitely there with that tactic! I will look into it on the next one

 

[HE>I]

3 wire pilot unit?

Yes sir, 3 wire pilot

 

[HE>I]

As you already bought parts for this unit, on some of these dinosaur units that are still in good overall condition, in the future when you come across a similar situation, you may want to consider buying a retrofit universal intermittent pilot spark ignition system, made by either Honeywell or Robertshaw. Packages comes with a natural gas valve ( there are kits to convert to propane ) flame sensor/spark ignitor and the module. They come in different BTU sizes, and comes with bushings to hook to either 3/4" or 1/2" gas pipe. Contractors price is somewhere around $ or less , wire in your operating existing safeties, check gas pressure, Comes with detailed instructions. Less call backs then trying to change parts on a dinosaur existing heating parts.

I will looking into retrofitting those parts, thanks for the tip!

 

[buttwheat]

What ignition module does it have? A small 2"x4" black one with a 2 wire hook up or the bigger 4"x8" black or gray molex connector(5wires i think).

 

[beenthere]

Prices removed.

 

[KevinAdv]

Just fixed a 58gs yesterday 26 years old

Recommended a new furnace no dice

Finally got it running good after 2 hours of cleaning and adjusting