Pyrox wall furnace f1 1 error after 5 mins of running possible causes Abe how to rectify that would be great

SOURCE: Furnace kicks on every 15 mins

fuanace may be oversized and is short cycling it heats up house to fast it is better when they run longer

SOURCE: Wall furnace shuts off after about 10-20 mins

sounds like its not venting properly...it likely is shutting off on a "Spill switch" or "Vent safety switch"....check the vent/chimney first off.....also the pilot could be dirty..,..a lazy pilot tends to blow out easily....pilot should be blue and sharp,,,big enough to fully envelope the thermocouple

Testimonial: "I checked the pilot light and it's clean. I will have to check the chimney next week but thanks!"