Author Topic: Dryer Won't Heat  (Read 12342 times)

Offline TSOL68

  • VIP Member
  • Member Since: May 2010
  • Posts: 16
Re: Dryer Won't Heat
« Reply #20 on: May 26, 2010, 04:01:04 PM »
Ok, I just got my new main board and I pretty much have the same results.  Coil 1 gets 120 DCV as ignitor is glowing, then coil 2 has nothing.  However, for about 3 or 4 seconds before the ignitor starts glowing, coil 2 gets 22DCV.

Offline john63

  • Technician
  • Member Since: Feb 2010
  • Posts: 508
Re: Dryer Won't Heat
« Reply #21 on: May 26, 2010, 04:24:36 PM »
Ok, I just got my new main board and I pretty much have the same results.  Coil 1 gets 120 DCV as ignitor is glowing, then coil 2 has nothing.  However, for about 3 or 4 seconds before the ignitor starts glowing, coil 2 gets 22DCV.

Follow the wires from the gas coils to the main board.
Look for chaffed/damaged wire(s).

Offline TSOL68

  • VIP Member
  • Member Since: May 2010
  • Posts: 16
Re: Dryer Won't Heat
« Reply #22 on: May 26, 2010, 04:38:25 PM »
Ok, will do.  Another thing, I was thinking after reading the service manual; could it possibly be the flame (or as the manual says "frame") sensor?  It seems like that part gives the signal for the main board to open valve 2?

Offline Beehive Appliance

  • VIP Member
  • Member Since: May 2010
  • Posts: 18
    • Beehive Appliance Service
Re: Dryer Won't Heat
« Reply #23 on: May 26, 2010, 04:51:45 PM »
Has anyone suggested that the ignitor may not be pulling enough amps to open the other coil? I have seen where the ignitor looks like it is working however it doesn't build up enough amperage to open the valve coil. I believe the amperage should be about 3-4 amps and is easily checked with a clamp on amp meter
Beehive Appliance is a family owned appliance repair business in Utah established in 1946. From dishwashers to dryers, we repair it all. If you are looking for expert service at a reasonable price, look no further. Beehive Appliance Service is your solution. Give us a call today! 801-523-8184

Offline john63

  • Technician
  • Member Since: Feb 2010
  • Posts: 508
Re: Dryer Won't Heat
« Reply #24 on: May 26, 2010, 05:36:41 PM »
Ok, will do.  Another thing, I was thinking after reading the service manual; could it possibly be the flame (or as the manual says "frame") sensor?  It seems like that part gives the signal for the main board to open valve 2?

If the *contacts* within the FLAME SENSOR are pitted---it can cause erratic burner function.

Offline john63

  • Technician
  • Member Since: Feb 2010
  • Posts: 508
Re: Dryer Won't Heat
« Reply #25 on: May 26, 2010, 05:37:33 PM »
Has anyone suggested that the ignitor may not be pulling enough amps to open the other coil? I have seen where the ignitor looks like it is working however it doesn't build up enough amperage to open the valve coil. I believe the amperage should be about 3-4 amps and is easily checked with a clamp on amp meter

This method (amperage) is not used in dryers.

Offline TSOL68

  • VIP Member
  • Member Since: May 2010
  • Posts: 16
Re: Dryer Won't Heat
« Reply #26 on: May 26, 2010, 06:09:42 PM »
Ok, will do.  Another thing, I was thinking after reading the service manual; could it possibly be the flame (or as the manual says "frame") sensor?  It seems like that part gives the signal for the main board to open valve 2?

If the *contacts* within the FLAME SENSOR are pitted---it can cause erratic burner function.

Thanks.  That is not my problem right now.  I'm not connected to gas, just trying to get the valves to each get 90DCV.  I'll check the wires tonight.

Offline Beehive Appliance

  • VIP Member
  • Member Since: May 2010
  • Posts: 18
    • Beehive Appliance Service
Re: Dryer Won't Heat
« Reply #27 on: May 26, 2010, 09:20:37 PM »
Has anyone suggested that the ignitor may not be pulling enough amps to open the other coil? I have seen where the ignitor looks like it is working however it doesn't build up enough amperage to open the valve coil. I believe the amperage should be about 3-4 amps and is easily checked with a clamp on amp meter

This method (amperage) is not used in dryers.
I know that amperage is from a more basic old school dryer, however, the second valve shouldn't open unless there is a hot enough ignitor. It is merely a safety issue. If he has replaced the board, I would check the valves resistance to be between 1500 ohms - 2500 ohms. If these are within spec then I would jump to the ignitor. The service manual says it should measure between 100 - 800 ohms. Another thing to remember, is that when you are taking these measurements make sure the component is unplugged from any wiring.
Beehive Appliance is a family owned appliance repair business in Utah established in 1946. From dishwashers to dryers, we repair it all. If you are looking for expert service at a reasonable price, look no further. Beehive Appliance Service is your solution. Give us a call today! 801-523-8184

Offline TSOL68

  • VIP Member
  • Member Since: May 2010
  • Posts: 16
Re: Dryer Won't Heat
« Reply #28 on: May 27, 2010, 12:45:24 AM »
Follow the wires from the gas coils to the main board.
Look for chaffed/damaged wire(s).

Wires appear to be fine.  A red one loops between the two coil plugs, and three wires (red, pink, and white) wrapped in electrical tape are fine to the main board.

Offline TSOL68

  • VIP Member
  • Member Since: May 2010
  • Posts: 16
Re: Dryer Won't Heat
« Reply #29 on: May 27, 2010, 12:49:26 AM »

I know that amperage is from a more basic old school dryer, however, the second valve shouldn't open unless there is a hot enough ignitor. It is merely a safety issue. If he has replaced the board, I would check the valves resistance to be between 1500 ohms - 2500 ohms. If these are within spec then I would jump to the ignitor. The service manual says it should measure between 100 - 800 ohms. Another thing to remember, is that when you are taking these measurements make sure the component is unplugged from any wiring.

The valve resistance is 1995 ohms and the ignitor is 185. 

 

IA84600 Inglis dryer doesn't heat

Started by RickT

Replies: 5
Views: 8269
Last post January 16, 2008, 04:02:42 PM
by JWWebster
maytag dryer model # md 3500 (no heat)

Started by #13

Replies: 5
Views: 7149
Last post December 05, 2007, 07:15:02 AM
by apptech
LG gas dryer wont heat

Started by berniet

Replies: 17
Views: 16113
Last post December 03, 2014, 12:15:07 AM
by BillR625
Whirlpool Dryer - Run, but does not heat.

Started by AJ

Replies: 2
Views: 3761
Last post January 10, 2014, 12:26:55 PM
by fairbank56
Creda dryer runs but makes only a little heat

Started by goldstonemr

Replies: 33
Views: 13661
Last post April 27, 2008, 02:56:23 PM
by Penguin45
No HEAT in Old Broad's Dryer

Started by babs277

Replies: 32
Views: 11078
Last post March 12, 2008, 10:03:43 AM
by JWWebster