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Ive got a laars mini-therm induced draft jvi. the problem is…

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Ive got a laars...

Ive got a laars mini-therm induced draft jvi . the problem is the burners go out but the system still runs. sometimes the reset on the flame roll out works if not I shut off power for 15 min power back system runs if not reset button will fier it up. just replaced the high limit switch , ihave it set at 180 deg.. runs great for awhile locks out with no warning the system still runs just no fire

Contractor's Assistant: I'll do all I can to help. How long have you been dealing with this?

Two weeks one week waiting for a new high limit switch

Contractor's Assistant: Do you plan on doing the work yourself?

Yes I worked hvac retired now

Contractor's Assistant: Are you an HVAC professional?

Retired installer

Contractor's Assistant: Anything else we should know to help you best?

Not at this moment

Submitted: 8 months ago.Category: HVAC
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Answered in 4 minutes by:
12/11/2017
HVAC Technician: Rick, HVAC Supervisor replied 8 months ago
Rick
Rick, HVAC Supervisor
Category: HVAC
Satisfied Customers: 24,602
Experience: 40+ yrs. experience as a licensed oil & gas technician.
Verified

Welcome to Just Answer, my name is ***** ***** I will do my best to help you with your issue. First I’ll need some more info so I have a more complete picture of your situation.

What reset button? on the burner flame rollout sensor?

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HVAC Technician: Rick, HVAC Supervisor replied 8 months ago

Then you have a dirty heat exchanger possibly a bad rollout sensor (not likely). A dirty (with soot) heat exchanger is an indication of inadequate air for combustion. The unit will have to be pulled apart and the heat exchanger cleaned.

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