If you’re looking for help fixing your Heil furnace, look no further! Our comprehensive Heil furnace repair guide will explain common issues, provide troubleshooting tips, and show you how to read your model’s error codes.
CODE: Two LED flashes
PROBLEM: Unit’s pressure switch didn’t open
FIX: Check for an obstruction in the pressure tubing
CODE: Three LED flashes
PROBLEM: Unit’s pressure switch didn’t close or reopened
FIX: Check for: excessive wind; if it’s the proper vent size; defective inducer motor; defective pressure switch; inadequate combustion air supply; disconnected or obstructed pressure tubing; or restricted vent
CODE: Four LED flashes
PROBLEM: Limit circuit fault: either a limit or flame rollout is open
FIX: Check for: restricted vent; loose blower wheel; excessive wind; dirty air filter; or defective blower
CODE: Five LED flashes
PROBLEM: An abnormal flame proving signal, the flame is likely proved while the gas valve is de-energized
FIX: Check for a leaky gas valve or a gas valve that is stuck open
CODE: Six LED flashes
PROBLEM: Failure to ignite or the flame sensor was lost while running
FIX: Check for: an ungrounded flame sensor; defective hot surface ignitor; control ground continuity; inadequate flame carryover; or rough ignition
CODE: Seven LED flashes
PROBLEM: Limit circuit lockout
FIX: A lockout will occur if the limit or flame rollout is open for longer than 3 minutes. Control will auto-reset after 3 hours.
CODE: Eight LED flashes
PROBLEM: Gas heating lockout, control won’t auto-reset
FIX: Check for a miswired gas valve or a defective control valve
CODE: Ten LED flashes
PROBLEM: Polarity is reversed
FIX: Review instructions to correct polarity
CODE: 1 + 2
PROBLEM: Blower is on after power up
FIX: Occurs if the unit is powered up during a call for heat or opens while the blower is on delay
CODE: 6 + 1
PROBLEM: Ignition lockout
FIX: Control will auto-reset after 3 hours
CODE: LED is off
PROBLEM: Secondary voltage fuse is open
FIX: Check whether the door switch isn’t closed or for a short circuit
CODE: LED is on
PROBLEM: Control circuitry lockout
FIX: Will auto-reset after 1 hour
CODE: LED is solid
PROBLEM: Gas valve relay is stuck while open, flame sense circuit failure, or software-check error
FIX: Reset power to clear the lockout and then replace control if status code repeats itself
What Our Clients Are Saying About Us
They were professional and made excellent recommendationsOctober 30, 2020
Daniel and his team made the purchase and installation of our new Furnace and A/C systems as enjoyable as such a large purchase can be. they were professional, made excellent recommendations and were very prompt completing installation. Would definitely recommend.
Thanks very much.
They were very professional and cleaned up any mess that was createdOctober 30, 2020
I had KDM install a new hotwater tank, and move a gas line. They were very professional, cleaned up any mess that was created, as well were very friendly to my kids who were asking a million questions. I would 100% use them again and recommend them to anyone.
The guys were all really nice and easy to deal with. Look forward to using them on my next project.October 30, 2020
These folks came in with a furnace humidifier and installed it in about 2hrs. The price was very reasonable. The guys were all really nice and easy to deal with. Look forward to using them on my next project.
The job went very smoothly and there was no mess left when they left.October 30, 2020
The Dan and Steve were great! My furnace went down and they were there the next day with a replacement for me which we were happy about as were in the January freeze. They showed up as expected laid out mats in the house so as to not dirty the floors. The job went very smoothly and there was no mess left when they left. They were both friendly and helpful explaining along the way and answering any questions I had. Prior to leaving they ensured everything was working properly and explained what I had to do to register the product for the warranty. They were fast, friendly and very professional. Definitely would recommend them to anyone looking for any heating or cooling work needed and I will be using them again when needed…thanks!
Daniel and his team are always very professional.October 30, 2020
Daniel and his team are always very professional. They not only install but ensure your aware of how the equipment works including how to service it. For a first time detached home owner this is extremely valuable information to have.
They got everything done in one day, They made sure to explain what’s going on, so we didnt have to worry.October 30, 2020
Dan and his team at KDM Home And Gas arrived on time and with all the supplies and professional tools required to do the complex job of installing the venting for our furnace and water heater.
They got everything done in one day, They made sure to explain what’s going on, so we didnt have to worry. Overall very professional and finished the job on time. I would recommend KDM home and gas to anyone!
Provided prompt reliable service and staff were knowledgeable and quite personable.October 30, 2020
Absolute pleasure dealing with KDM. Provided prompt reliable service and staff were knowledgeable and quite personable. I would highly recommend Daniel and his team!
Dan and his staff that I have met are of the utmost professionals.October 30, 2020
I have been in discussions with KDM for quite a while on a separate project.
Dan (owner) and his staff that I have met are of the utmost professionals. They are down to earth, very easy to talk to and are efficient and VERY knowledgeable in the products and work they can do for their customers.
Will definitely recommend them and possibly use them again.
Dan himself is an absolute pleasure with which to deal. He's friendly, honest, and never tries to upsell you.October 30, 2020
I met Dan when he replaced our furnace. I then asked him to come back and replace our water heater at a later date. Dan and his team come when they say they will and always finish within the time frame they specify. Dan himself is an absolute pleasure with which to deal. He’s friendly, honest, and never tries to upsell you. I greatly appreciate how he invariably lays out all the details of each option, providing all the advantages and disadvantages to each, and then allows you, the customer, to make your own determination as to what you feel might be best suited to your needs. I will most definitely be using Dan for our future addition which we will be building soon.
We'll be adding them to our speed dial for our next heating and cooling jobs.October 30, 2020
We brought in KDM to replace our outmoded Air Conditioner. Not only did their friendly and talented crew replace and actually improve our central air system, they also helped us get the rest of our heating system in order, and walked us through everything to make sure we knew how everything worked and what projects we should consider tackling next. Daniel and his team were a pleasure to work with and we’ll be adding them to our speed dial for our next heating and cooling jobs.