I still dont know if my kalins furnace has a gas leak . I had two of your tech,s out here and I still don,t feel safe..I paid for extra warrenty just come back and retest it . your last tech said he tighten the fitting .that the previous tech said was fine well guess what still smelt gas and your sniffer went off.just come back and show me it is not leaking . give me a call lets talk ...I am not stupid.....