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Carrier rooftop unit (by 2 users)


posted by paulka on Dec 05, 2007


fan runs but the heat will cycle once and then stop, checked and replaced the ignitor and servised the unit, what's up

Comment by paulka, posted on Dec 06, 2007

it was a roof top carrier unit for heating and ac model number as follows 48HJR014-56185 tried a hot suface ignitor but problem still there
I have the same problem.
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1 Other User Has The Same Problem

Comment by Guest, posted on Oct 09, 2008

need to find a way to support a 10 ton RTU on a steel joist roof. wt = 925#

Solution #1

posted on Dec 07, 2007
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Guest

Rank:Apprentice Apprentice
Rating: 0%, 0 votes
figured it out, the problem was return air ducting was capped off, by the construction crew, thanks
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Solution #2

posted on Dec 06, 2007
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Therinnaiguy

Rank:Guru Guru
Rating: 87%, 209 votes
A model number may help. Also, are you refering to the inducer fan?

If so, jump out the pressure switch. If it runs, start looking for a blockage in the combustion chamber, blockage in the line to the pressure switch, a bad inducer fan (not getting enough pressure to close switch) or a bad pressure switch.

Comment by Therinnaiguy, posted on Dec 06, 2007

OK, check out the things I suggested and get back to me.
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