這些年，那些房之事（八）

這個係列的上篇和後記，提到我們的HeatPump熱泵和Furnace電暖爐的兩次故障維修。誰知，那還沒完呢，因為三月底我們發現熱泵又不工作了。短短時間接連壞，我們要求免費的測試找出真正問題。努力之外，YORK Distributor分銷商，同意讓之前安裝新係統的Dealer 代理的師傅上麵檢查。

邪門的是，4月9號，師傅上門那天，剛進來，我調高了一下控製的設置溫度，熱泵就又工作了。這，我們試過多次，熱泵從沒啟動過。他還是用儀器設備在外麵的熱泵檢測了一番，又進來在控製器上操作一番，告訴我們啥啥都正常，走了。

可是一周多後，4月17號，我們發現熱泵又不工作了。跟代理扯皮之中，4月23號上午，它又開始時不時啟動，正常工作，直到4月28號，又不動了。繼續和YORK的分銷商聯係，終於，他們再次讓代理師傅上門。這次，又更換了控製熱泵啟動的傳感器 liquid line sensor。同時，他也重新裝了一條連接室內的Furnace和室外的熱泵的新信號線signal cable。原來，上次他們來安裝新係統的時候，居然直接用了原來那條、用過不知道幾十年的老線，沒有換新線！

信號線在太陽房下麵過的那一段，外麵看不到。不過，從兩頭能看到的地方的狀態來看，應該是損壞得不輕的。這樣一來，就很好解釋控製器壞、傳感器一壞再壞、和熱泵時好時壞的現象了。

把最先跟分銷商溝通的郵件主要內容，放這裏做個記錄。順便也證明一下，我最開始的判斷是有道理的 ：）

2021年4月5日，email to YORK Distributor

We started to have problem during January 30th 2021, no heat at all ! Only cold air came out of the vents. (The dealer’s) technician came on February 1st to fix this. He did some tests but to my knowledge he didn't check the Heat Pump that time. He found out that it was a faulty thermostat and he replaced it, and charged only for labor by about $186. Heat was back.

In late February, we noticed that the furnace was often working and discovered that the fan of the Heat Pump was not turning at all, regardless of that the weather was not that cold… They (the dealer) came on March 2nd to check and found out it was a faulty Heat Pump cable/probe called liquid line sensor. They changed it and charged us another $186.

For the first a few days afterwards, we closely monitored the heat pump and saw it working fine.  So, we did not pay more attention until in late March... Only on March 31st, we realized that the Heat Pump Fan was not turning again!

We called them on April 1st to report this, and let them know we are not satisfied having those problems with our new system consistently and having to pay for labor $186 every time! So, they decided to run some simple tests assisted by us ……. The heat pump started to work.

We monitored the heat pump during that day and it was working fine. However, the next day April 2nd, the Heat Pump stopped working again. So, we did the same reset as what's done the previous day, but this time nothing happened!

At this point, we want a technical expert to run a complete diagnostic free of charge (under warranty) for the whole system and find out what's really wrong to cause these breakdowns in such a short period of time.  For us, it seems that the heat pump itself is fine, but something in the system related to signals is wrong, which trigged thermostat and liquid line sensor's failure.