Furnace clicks on and off (alot)
Hi,I'm new here and have found this to be a very informative forum and would like to see if someone can help me out.I have a intertherm model # MGHA-056ABFC-02 HEAT AND A/C unit. My problem is Thermostat kicks on,heat comes on and builds up to temp. in the unit,Fan comes on and runsbut it just runs for about a minute and cuts off ,then comes back on and runs for another minute.It does this about 8-10 times per heating cycle.(fan off and on) This can't be to efficient! I replaced the fan switch part #626337 and it still does it. Do you know anything else it could be? Any help will be greatly appreciated. Thanks Scott
Hi,
Take the middle black Line power wire off the middle terminal on the furnace fan-auto-on switch and also remove the blue wire from the 1 terminal.
Connect them together. You can also jumper across the 1 and middle terminals.
See if that resolves it.
Thanks,
Robert
Take the middle black Line power wire off the middle terminal on the furnace fan-auto-on switch and also remove the blue wire from the 1 terminal.
Connect them together. You can also jumper across the 1 and middle terminals.
See if that resolves it.
Thanks,
Robert
Some people are Humbly Grateful, while some are Grumbly Hateful.................... Which one are you ?
Hi Scott,
You're very welcome, happy to help. That switch is a common intermittent problem area. Hopefully that resolves it, if not, may be a short in wiring.
Another possibility was air getting to the fan switch cooling it down too quickly.
Merry Christmas to you and yours as well !!
Take care and best wishes,
Robert
You're very welcome, happy to help. That switch is a common intermittent problem area. Hopefully that resolves it, if not, may be a short in wiring.
Another possibility was air getting to the fan switch cooling it down too quickly.
Merry Christmas to you and yours as well !!
Take care and best wishes,
Robert
Some people are Humbly Grateful, while some are Grumbly Hateful.................... Which one are you ?
Robert!
Seems as though he's having the very same thing happening to his as I am with my Intertherm unit.
The switch you were referring to is the limit switch inside the metal power box on the burner?
I will be paying close attention to this post to see if he gets his resolved or not.
Seems as though he's having the very same thing happening to his as I am with my Intertherm unit.
The switch you were referring to is the limit switch inside the metal power box on the burner?
I will be paying close attention to this post to see if he gets his resolved or not.
I am a certified ford diesel tech, "Retired Now" Ford Parts Department counter man, computer consultant, repairman & programmer
David,
His was just the fan going on and off, not fan and burner.
The switch is not a limit switch, it is the fan-auto-on switch at the furnace.
Thanks,
Robert
His was just the fan going on and off, not fan and burner.
The switch is not a limit switch, it is the fan-auto-on switch at the furnace.
Thanks,
Robert
Some people are Humbly Grateful, while some are Grumbly Hateful.................... Which one are you ?
Hey Robert!
Had to try the jumping the blue & black wire myself But when I did the unit fan & burner would not come on.
Took the original factory 6262920 limit switch out of the chamber & it had a large amount of dust on the 2 switches & plate.
Just got through reinstalling the limit switch Robert & it weems to be working now.
No cycling on & off & the burner does come on when turning up thermostat & then burner goes off when lowering the themostat.
Will go ahead & reconnect the Hunter digital back up the way it was before & disconnect the wires from the Intertherm thermostat & see if its still running ok.
The dust being all caked on the swtches inside the unit cause this to happen?
Thanks for your support.
David
You've been a great help.
Happy Holiday's
Had to try the jumping the blue & black wire myself But when I did the unit fan & burner would not come on.
Took the original factory 6262920 limit switch out of the chamber & it had a large amount of dust on the 2 switches & plate.
Just got through reinstalling the limit switch Robert & it weems to be working now.
No cycling on & off & the burner does come on when turning up thermostat & then burner goes off when lowering the themostat.
Will go ahead & reconnect the Hunter digital back up the way it was before & disconnect the wires from the Intertherm thermostat & see if its still running ok.
The dust being all caked on the swtches inside the unit cause this to happen?
Thanks for your support.
David
You've been a great help.
Happy Holiday's
I am a certified ford diesel tech, "Retired Now" Ford Parts Department counter man, computer consultant, repairman & programmer
Dust can restrict the air getting to switch and change operating temps. Those two switches are a limit and a fan.
Thanks,
Robert
Thanks,
Robert
Some people are Humbly Grateful, while some are Grumbly Hateful.................... Which one are you ?
Thanks!
It appears to be working ok now.
I'll bet the dust on the switches made a diiferance.
Had to clean it off with a rag cause the dust was kinda stickey & not dry where yo could just blow it off.
Of course the Hunter thermostat is bad anyway cause when it's hooked up the unit keeps cycling on & off like I mentioned earlier & doesn't when I have the old Intertherm standard thermostat hooked up.
Going with a standard type, don't trust those digital type unless you recommend the HoneyWell as being the best & more reliable.
Read my original post.
Left a message there.
Sorry to intrude on this one.
It appears to be working ok now.
I'll bet the dust on the switches made a diiferance.
Had to clean it off with a rag cause the dust was kinda stickey & not dry where yo could just blow it off.
Of course the Hunter thermostat is bad anyway cause when it's hooked up the unit keeps cycling on & off like I mentioned earlier & doesn't when I have the old Intertherm standard thermostat hooked up.
Going with a standard type, don't trust those digital type unless you recommend the HoneyWell as being the best & more reliable.
Read my original post.
Left a message there.
Sorry to intrude on this one.
I am a certified ford diesel tech, "Retired Now" Ford Parts Department counter man, computer consultant, repairman & programmer
I'm happy now that everything is back to normal.
Your the best.
Case closed!
Your the best.
Case closed!
I am a certified ford diesel tech, "Retired Now" Ford Parts Department counter man, computer consultant, repairman & programmer
-
- Similar Topics
- Replies
- Views
- Last post
-
-
Nordyne M1MB clicks 4 times when starting
by olsonlaaa » Thu Aug 24, 2017 10:54 am » in Nordyne Service & Repair - 0 Replies
- 47704 Views
-
Last post by olsonlaaa
Thu Aug 24, 2017 10:54 am
-
-
-
Intertherm/Nordyne feh-015ha furnace issues blower not working, unit will only turn off at breaker box
by onmypath78 » Sat Mar 16, 2019 12:11 pm » in Nordyne Service & Repair - 0 Replies
- 167503 Views
-
Last post by onmypath78
Sat Mar 16, 2019 12:11 pm
-
-
-
Nordyne M1B1 furnace issue - thermostat c wire not hooked up correctly. It's running off atteries instead
by Tallestt » Mon Apr 20, 2020 6:27 am » in Nordyne Service & Repair - 1 Replies
- 43421 Views
-
Last post by taurolyon
Tue Jun 23, 2020 4:02 pm
-
-
- 1 Replies
- 42064 Views
-
Last post by Greg
Sat Jan 06, 2018 9:11 am
-
-
Intertherm outdoor a/c unit, blower not turning off. Model unknown rating plate is faded out.
by tkrueger » Sat May 05, 2018 8:57 pm » in Nordyne Service & Repair - 0 Replies
- 116542 Views
-
Last post by tkrueger
Sat May 05, 2018 8:57 pm
-