Radiant Floor Heating/Munchkin F09 error code


I have a Munchkin Model 140MLPR1 Boiler installed in my home. I have had six years of trouble free service. Suddenly, it started coding f09 indicating No flame detected. usually on the second reset it fires up. I call a furnace company that does Munchkin furnaces, they came out and cleaned and installed a gasket kit., for a total bill of $ 360.00. Unfornatley, it is still doing the same thing. It sparks, then flames, but seems to blow it self out. I have had service repairman back and he check it out, ran good for two days and has now started to code F09 again and have to keep resetting. He seems to be lost on this problem.

Any thoughts would be appreciated.

Thank you

Munchkin F09 error code reads "no flame detected". This is normally a sure sign of neglect. Munchkin 140M, just like the Peerless Pinnacle PI140 must be properly set up with a combustion analyser and serviced annually by a competent technician.

We often find the early Munchkin boilers to be a little tired and in need of the 925 upgrade kit. This kit will solve several issues common in the early Munchkins. We have also found the blowers worn out, likely from running more than they should. Upgrades and tuneups with the right diagnosis and the right parts, followed up by careful tuning using an electronic combustion analyser will nearly always make a Munchkin right-as-rain.  

We also find the programming off and the boiler running hotter and longer than necessary, compromising potential efficiency and safety. The target walls must be inspected and the condensate drain cleaned as one will effect the other.

The target walls must be inspected and the condensate drain cleaned as one will effect the other. This is a critical step in annual Munchkin maintenance. See pictures.

Without annual maintenance the Munchkin, like most condensing boilers, will not perform to its full potential, first giving up efficiency, then reliability and finally safety. Be safe, find a good high efficiency boiler company and stick with them. Sign a contract to have it serviced every year.

Here in Minneapolis we service hundreds of condensing boilers and Munchkin is one of them. We carry parts on our trucks and train technicians in the best practice for proper cleaning and tuning of the Munchkin products. High performance isn't free.

Naturally, all the information in the world will be of no use without the proper tools, and skill to use them.  

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Morgan M. Audetat


Radiant panel heating design, including floors and ceilings, European wall panels and snow melting for residential and light commercial buildings..............................................................-Master of Steam and Hot Water,City of Minneapolis....................................................--- Master Plumber, State of Minnesota...........


30 years..... Charter Board Member - Radiant Panel Association, former manufacturer of condensing boilers, former national distributor of radiant floor products, son and apprentice of mechanical & plumbing contractor. Current owner---www.BadgerRadiantDesigns.com---Minneapolis mechanical/plumbing contractor specializing in hydronic based, integrated HVAC systems. Radiant floor heating/cooling. Snow Melting. Condensing Boilers. Indirect water heaters. System design, consulting and technical training world-wide. Licensed contractor, designer, installer and consultant.

B.S. University WI 1981 CONTINUING EDUCATION: Viessmann Condensing boiler and Solar water heating certification 2010, N.D.S.U. Lead Worker RRP certification 2010, Knight condensing boiler certification 2009, Wrightsoft Manual J CAD certification 2009, RPA Designer & Installer Certification 2008, Nate Hydronic/Forced Air Certification 2008, Uponor/Wirsbo advanced design school certification 2007, Buderus Wall-hung certification 2007, Power Limited License (low voltage controls) 40 CE credits 2005, Basic Hydronic Certification IPEX & Northern Alberta Institute of Technology 1998, Charter Board Member - Radiant Panel Association 1994, Residential Off-Electric to Hydronic Conversion Heating School Canadian Hydronics Council 1994, B&G Little Red School House 1993, Rood Utilities (now Auburn Technical Institute) Oil Burner School 1993 ,Tekmar Controls residential and commercial 1993, Division Manager and Advanced Hydronic Seminar Instructor for the first Exclusively Hydronic Radiant Floor Distributor in the USA 1990, Hydronic Radiant Heating Association Workshop participant with Richard c. Bourne, PE spring 1988, Master Plumbing, Hydronic, Solar Course Red Rocks Community College 1987.

Awards and Honors
2009 System Showcase Award - Radiant Panel Association

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