OT: Furnace spark control

Slowpoke

Well-known Member
I need to replace the pilot ignition module on my rooftop HVAC unit.
It's a UT Controls Intermittent Pilot Ignition.
The original is marked 1003-600A Series. A separate tag on the module reads 1003-662A-1.
I find many replacement units that are the 1003-600A series, but have numbers like 1003-633A,
1003-665A, 1003-620A, etc. Are these interchangeable directly with the original?
Thanks :-
 
UT is not real good at sharing product information. You might find a customer service number and give them a call, but they are a huge company, probably not going to be much help.

The igniters are mostly universal. Might try looking for universal models online to find the best price. The universals typically have all the options available,just don't use the ones not needed.
Universal Module
 
If there is an HVAC supply house near you take your old one and have them look at it. Most supply houses are somewhat friendly. Just don't act like a total bozo or they will throw you out the door. They don't like amature mechanics.
 
Steve has a good universal unit listed. Just be aware that these modules have different trial periods and either just stop or retry again after so much time. All of that information is on the lable of the unit. A lot of kitchen equipment have these in them. Biggest problem is cooking grease in the air and idiots with garden hoses. This looks like a hot surface ignition unit? If it is you should change that out also. When that little gizmo is going bad the resistance changes and it can kill the control box. DON'T touch it with your fingers!
 
(quoted from post at 09:50:00 11/17/18) Steve has a good universal unit listed. Just be aware that these modules have different trial periods and either just stop or retry again after so much time. All of that information is on the lable of the unit. A lot of kitchen equipment have these in them. Biggest problem is cooking grease in the air and idiots with garden hoses. This looks like a hot surface ignition unit? If it is you should change that out also. When that little gizmo is going bad the resistance changes and it can kill the control box. DON'T touch it with your fingers!

This is a furnace igniter. It creates a spark to light the gas. I don't understand why it would require trial periods.
 
(quoted from post at 15:29:20 11/17/18)
(quoted from post at 09:50:00 11/17/18) Steve has a good universal unit listed. Just be aware that these modules have different trial periods and either just stop or retry again after so much time. All of that information is on the lable of the unit. A lot of kitchen equipment have these in them. Biggest problem is cooking grease in the air and idiots with garden hoses. This looks like a hot surface ignition unit? If it is you should change that out also. When that little gizmo is going bad the resistance changes and it can kill the control box. DON'T touch it with your fingers!

This is a furnace igniter. It creates a spark to light the gas. I don't understand why it would require trial periods.

In this case, "trial period" is the number of seconds the module will keep the gas valve open, waiting for the flame to light and to be sensed ("proven").

If flame is sensed within the programmed time, all is well and the heating cycle will run it's course.

If NO flame is sensed within the trial period, the gas valve will be closed, and the cycle will repeat, or the system will go into "lockout" depending upon the exact way the manufacturer specified that the unit be programmed.

Don't know anything specific to the module you are dealing with, some units "lock out" after one or more tries, some are continuous retry.
 
Hey Bob, another thought on his unit. If that setup is a pilot flame
and not a hot surface type, he could have a pilot that is full of fuzz
bunnys or crud of some kind. He wants a nice big blue or purple blue
flame about an inch long. If orange it is cruddy and needs to be blown
out with an air hose. That is why I told him to take it to a HVAC
supply. There are so so many types of these boxes. And then you can
get into the type of sensors and on and on. Micro and milli systems.
Bet his is 24v AC Supply. Some of the older systems had 120v hot
surface glow coils. When good they would Ohm out at 64 ohms. A little
hard trying to diagnose systems on a help line.
 
It is 24v ac, 150 ma.
I am looking at the Honeywell S8610U, supposed to be universal. But the replacement chart does not list UT Controls.
Now I understand the trial period. There is a site called ACservicetech that shows very detailed troubleshooting for intermittent pilot ignition for gas furnaces.
Still haven't found the answer to the different numbers on the 1003-600A series modules.
 
I want to second the recommendation to use a universal replacement. That's what I did on a furnace with an obsolete controller; it lasted about ten years until the furnace failed inspection (it was in a rental property).
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top