I have a Carrier 58ST gas heating furnace that came with the house four years ago. It's worked great until tonight. The furnace cycles up up until the point I believe the igniter coils usually light up. However, they never do. Just like the manual says in this situation, the unit cycles three times and then locks out. I flipped the breaker and unit power switch off and on, but same three cycles take place then it locks out. Considering the slight hazard, I didn't want to push my luck.
I talked to a tech at Frymire by phone and he agrees with me it's likely the ceramic igniter coil has cracked. It's not a part under warranty, though. It looks easy enough to replace, power plug and two nuts. This is my first house, so I'm getting broken in on this maintenance stuff...heh. Wouldn't mind some input on the diagnosis, though. Still not sure if it's possible to order such a part, but plan to check tomorrow. Fortunately, it's not going to freeze the rest of the week! Thanks
2006-12-11 12:52:39 · 7 answers · asked by Joe D 6 in Home & Garden ➔ Maintenance & Repairs
The tech had suggested I shine a flashlight in there to see if the ceramic had cracked. Don't see any cracks, but ver small blemish on the coil barely visible. (Correction, model is actually 58STA.) I'm still fairly confident it's the coil (Heat Surface Ignitor). Any ideas where to look for this part that would be sold to a consumer? Thanks!
2006-12-11 13:27:04 · update #1
I believe the 58STA is an 80% furnace.
2006-12-11 16:09:48 · update #2
yes sounds like it needs to be replaced and is not a very hard job at all. when you go to get new one just remember to write down make, model, and serial # as this is always asked when getting parts to anything. it should come with very detailed installation instructions. but remember to turn off power. even thogh it may look like that ceramic isnt working it can still be getting extremely hot and may burn your skin instantly. have seen this happen before so just want to warn you. hope this info helps
2006-12-11 13:03:23 · answer #1 · answered by paulbadluck 2 · 1⤊ 0⤋
I happen to have had the same problem last week with my high efficiency Amana furnace. The repairman first suspected the HSI (hot surface igniter), so he clamped an ampmeter onto one of the wires going to the HSI. The current appeared to be normal. Somewhat puzzled, he temporarily replaced the control board. No change. Even more puzzled, he took out the HSI, which was very easy to remove. He handled it very carefully, but even so, he damaged the gasket and had to put in a new one. But the HSI seemed to be OK. Eventually, he replaced the electric gas valve, which was sticking shut. He told me that in 19 years of servicing furnaces, this was the first time he had to replace the gas valve.
But back to your problem. If you have access to an ampmeter, see if there is any current going to your HSI. Also see if there is a voltage on the HSI. If you have current, the HSI may be OK. If you have voltage but no current, the HSI is probably bad. If you have no voltage, the problem is elsewhere.
You might also remove the HSI and see if it gets red hot during the ignition cycle. Be careful how you handle it and don't get burned.
Johnstone Supply is one company that sells replacement furnace parts: http://www.johnstonesupply.com
They have stores across the country, perhaps where you live.
Or, you can buy a hot surface igniter online. Here is one source:
http://bestbuyheatingandairconditioning.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=BB&Product_Code=HSI41409&Product_Count=&Category_Code=
2006-12-11 17:40:14 · answer #2 · answered by Tech Dude 5 · 0⤊ 0⤋
The hot surface ignito should get line votage(120 volts).Chek that the furnace is properly grounded,check ignitor voltage at ignition control,check continuity of ignitor if you have had or done any electrical work done check polarity.Also if combustin motor does not prove pressure switch igntor won't power,check if barbed fitting on indcer is plugged, use paper clipto clear.Pressure should close when inducer runs.Cheeck exhaust and or intake(combustion for blockage.Board on furnace may have error code.
2016-03-17 21:26:17 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Coil Ignitor
2016-10-20 06:53:24 · answer #4 · answered by ? 4 · 0⤊ 0⤋
If it cracked there will be a white line across the crack. after 4-5 years they all crack. in carriers they are all the same easy to change unless a 90% furn. cost about 40 here or.
2006-12-11 14:10:35 · answer #5 · answered by robert c 3 · 0⤊ 0⤋
If you had a volt/ohm meter you could check the resistance of the coil to see if is open. You could also check to see if voltage is going to coil at the proper time.
Other than that it probably is the coil.
2006-12-11 19:09:58 · answer #6 · answered by hjking0 2 · 0⤊ 0⤋
very simple to change just like paul said get all your info just remember not to touch the ceramic part of the new one they are very fragile and the more you touch it the faster it will burn out again
2006-12-11 13:18:47 · answer #7 · answered by drain-king 2 · 0⤊ 0⤋