I ran into an interesting situation yesterday. I'm 90% sure I froze my boiler HX with my air conditioning (froze on the outside of the HX, not inside). I ran the AC for several weeks last year and never had any issues. But yesterday I let the heat in the house get away with me and didn't turn the AC on until it had hit 86 in the house. To get the house down to 79 took 6-7 hours. Shortly before hitting my set temperature the air coming from the vents dramatically reduced. I went downstairs and everything was running but the fan sounded "odd". When I got closer my furnace was pushing a lot of air out of the small crack between the AC unit and the furnace. I was also feeling a fair amount of air coming out of the gap around my boiler HX (more than normal).
My only conclusion is that the extreme humidity combined with the extended run froze up my HX yesterday which prevented flow of cool air through the house. Anyone else ever done this? I was moderately concerned that freezing the water inside the HX would be extremely bad. But pressure was holding so I can only assume this didn't happen.
Am I the only one to have experienced this? Traffic is slow in the boiler room this time of year so I thought this might be an interesting discussion...
My only conclusion is that the extreme humidity combined with the extended run froze up my HX yesterday which prevented flow of cool air through the house. Anyone else ever done this? I was moderately concerned that freezing the water inside the HX would be extremely bad. But pressure was holding so I can only assume this didn't happen.
Am I the only one to have experienced this? Traffic is slow in the boiler room this time of year so I thought this might be an interesting discussion...